This build is almost untouched - in fact, even OneDrive is kept - and adds about 30 themes.
Since this is my first Windows 11 25H2 mod I decided to celebrate by adding it black cat wallpapers, just like on my main PC!
Updates are fully supported...

Build Info
OS: Windows 11 Pro 25H2[Insider Dev Build]
Build: 26200.5670
ISO Size: 5.13 GB
Install size: 14GB
Compression: ESD
Language: English
Treatment: Script in "Extras"
Removed Components

57-bit Linear Addressing
Application Virtualization (App-V)
Clipchamp.Clipchamp
Content Delivery Manager
Cross Device Experience Host
Dev Home
Feedback Hub
File Explorer (Legacy)
Game Bar
Game Speech Window
Microsoft 365 (Office)
Microsoft Bing Search
Microsoft Edge DevTools Client
Microsoft Engagement Framework
Microsoft Family Safety
Microsoft Family
Microsoft News
Microsoft Sticky Notes
Microsoft Teams
Microsoft To Do
MSN Weather
Outlook for Windows
Phone Link
Power Automate
Solitaire & Casual Games
User Experience Virtualization (UE-V)
Windows Camera
Windows Clock
Windows Sound Recorder
Windows Terminal
Windows Web Experience Pack
Xbox App
Xbox TCUI

Added
Only StartAllBack and Extras

Homepage

https://www.microsoft.com