zdnet[.]com/article/windows-11-alternative-shells/
seelen[.]io/
github[.]com/eythaann/seelen-ui
Seelen is Interesting. It's a relatively small app that sits on top of Windows, doesn't add a ton of files or registry entries, doesn't take over anything really, and lets you give Windows a new look and feel. Depending on how you use Windows, it might even give you a productivity boost.