Tiles 2 should work fine on Windows 11.
Only Start10 (which was replaced by Start11), WB and Curtains should not work.
WB due to a bug in the OS itself primarily and Curtains due to significant structural changes in the OS. Neither product have ever been sold as Windows 11 compatible.
Stardock have released updates to make Groupy more functional on Win11, Start11 and Fences 4 and other products will get updates during the year, though I cannot promise which apps and the time scales for any updates. Some apps may end up end of life.
Development is targeted towards the apps which sell better first as it makes sense.
The userbase on Win11 is still significantly smaller than Win10 by about 5-6 times.
Windows 11 was released not that long ago, patience is required if you are an early adopter and jump onto a new OS especially one with an absurdly short beta process.