diff --git a/custom/conf/app.example.ini b/custom/conf/app.example.ini
index 41599d411e..da657df60c 100644
--- a/custom/conf/app.example.ini
+++ b/custom/conf/app.example.ini
@@ -1025,6 +1025,10 @@ LEVEL = Info
 ;; The set of allowed values and rules are the same as DEFAULT_REPO_UNITS.
 ;DEFAULT_FORK_REPO_UNITS = repo.code,repo.pulls
 ;;
+;; Comma separated list of default mirror repo units.
+;; The set of allowed values and rules are the same as DEFAULT_REPO_UNITS.
+;DEFAULT_MIRROR_REPO_UNITS = repo.code,repo.releases,repo.issues,repo.wiki,repo.projects,repo.packages
+;;
 ;; Prefix archive files by placing them in a directory named after the repository
 ;PREFIX_ARCHIVE_FILES = true
 ;;
diff --git a/models/unit/unit.go b/models/unit/unit.go
index 6251d44c9b..a14f3ff364 100644
--- a/models/unit/unit.go
+++ b/models/unit/unit.go
@@ -1,4 +1,5 @@
 // Copyright 2017 The Gitea Authors. All rights reserved.
+// Copyright 2024 The Forgejo Authors. All rights reserved.
 // SPDX-License-Identifier: MIT
 
 package unit
@@ -69,7 +70,7 @@ func (u Type) LogString() string {
 }
 
 var (
-	// AllRepoUnitTypes contains all the unit types
+	// AllRepoUnitTypes contains all units
 	AllRepoUnitTypes = []Type{
 		TypeCode,
 		TypeIssues,
@@ -83,7 +84,7 @@ var (
 		TypeActions,
 	}
 
-	// DefaultRepoUnits contains the default unit types
+	// DefaultRepoUnits contains default units for regular repos
 	DefaultRepoUnits = []Type{
 		TypeCode,
 		TypeIssues,
@@ -95,12 +96,22 @@ var (
 		TypeActions,
 	}
 
-	// ForkRepoUnits contains the default unit types for forks
+	// ForkRepoUnits contains default units for forks
 	DefaultForkRepoUnits = []Type{
 		TypeCode,
 		TypePullRequests,
 	}
 
+	// DefaultMirrorRepoUnits contains default units for mirrors
+	DefaultMirrorRepoUnits = []Type{
+		TypeCode,
+		TypeIssues,
+		TypeReleases,
+		TypeWiki,
+		TypeProjects,
+		TypePackages,
+	}
+
 	// NotAllowedDefaultRepoUnits contains units that can't be default
 	NotAllowedDefaultRepoUnits = []Type{
 		TypeExternalWiki,
@@ -172,6 +183,8 @@ func LoadUnitConfig() error {
 	if len(DefaultRepoUnits) == 0 {
 		return errors.New("no default repository units found")
 	}
+
+	// Default fork repo units
 	setDefaultForkRepoUnits, invalidKeys := FindUnitTypes(setting.Repository.DefaultForkRepoUnits...)
 	if len(invalidKeys) > 0 {
 		log.Warn("Invalid keys in default fork repo units: %s", strings.Join(invalidKeys, ", "))
@@ -181,6 +194,16 @@ func LoadUnitConfig() error {
 		return errors.New("no default fork repository units found")
 	}
 
+	// Default mirror repo units
+	setDefaultMirrorRepoUnits, invalidKeys := FindUnitTypes(setting.Repository.DefaultMirrorRepoUnits...)
+	if len(invalidKeys) > 0 {
+		log.Warn("Invalid keys in default mirror repo units: %s", strings.Join(invalidKeys, ", "))
+	}
+	DefaultMirrorRepoUnits = validateDefaultRepoUnits(DefaultMirrorRepoUnits, setDefaultMirrorRepoUnits)
+	if len(DefaultMirrorRepoUnits) == 0 {
+		return errors.New("no default mirror repository units found")
+	}
+
 	// Collect the allowed repo unit groups. Mutually exclusive units are
 	// grouped together.
 	AllowedRepoUnitGroups = [][]Type{}
diff --git a/modules/repository/create.go b/modules/repository/create.go
index 060b995bc5..becfed0370 100644
--- a/modules/repository/create.go
+++ b/modules/repository/create.go
@@ -69,8 +69,11 @@ func CreateRepositoryByExample(ctx context.Context, doer, u *user_model.User, re
 
 	// insert units for repo
 	defaultUnits := unit.DefaultRepoUnits
-	if isFork {
+	switch {
+	case isFork:
 		defaultUnits = unit.DefaultForkRepoUnits
+	case repo.IsMirror:
+		defaultUnits = unit.DefaultMirrorRepoUnits
 	}
 	units := make([]repo_model.RepoUnit, 0, len(defaultUnits))
 	for _, tp := range defaultUnits {
diff --git a/modules/setting/repository.go b/modules/setting/repository.go
index c9e70560d0..7e774f0139 100644
--- a/modules/setting/repository.go
+++ b/modules/setting/repository.go
@@ -1,4 +1,5 @@
 // Copyright 2019 The Gitea Authors. All rights reserved.
+// Copyright 2024 The Forgejo Authors. All rights reserved.
 // SPDX-License-Identifier: MIT
 
 package setting
@@ -52,6 +53,7 @@ var (
 		DisabledRepoUnits                       []string
 		DefaultRepoUnits                        []string
 		DefaultForkRepoUnits                    []string
+		DefaultMirrorRepoUnits                  []string
 		PrefixArchiveFiles                      bool
 		DisableMigrations                       bool
 		DisableStars                            bool
@@ -175,6 +177,7 @@ var (
 		DisabledRepoUnits:                       []string{},
 		DefaultRepoUnits:                        []string{},
 		DefaultForkRepoUnits:                    []string{},
+		DefaultMirrorRepoUnits:                  []string{},
 		PrefixArchiveFiles:                      true,
 		DisableMigrations:                       false,
 		DisableStars:                            false,