Start 10 seems to be working ok.
Hmmmm, just installed it, and it's not working for me, unless there's some kind of special settings, I've missed, made changes to the start menu (via Start10) and nothing, enabled the "Show icons as tiles split into", nothing, tried "Allocate room for at least (12 ) icons, and again, nothing, moved start menu to the left, still nothing, so I'm not sure, what's working on your end.
I'm running a 5th Gen i7 system, OS build is Windows (11) Insider Dev Channel 22000.65 co_release.