I have upgraded from 21.04 to 21.10 having first switched off my gnome extensions as I have had problems upgrading with Gnome extensions switched on in the past. The upgrade seems to have worked ok but my extensions are no longer available. The Tweak tool no longer supports the extensions and https://extensions.gnome.org/local/ shows that a lot of extensions are now "Out of Date" due to 21.10 using Gnome 4. The extensions that are not greyed out and marked "Out of Date" can be switched on with the toggle but do not actually appear on the desktop, and the next time I look on https://extensions.gnome.org/local/ they are switched off again.

Is there any way to use Gnome extensions in Ubuntu 21.10/Gnome 4? I need some of them for my daily work and I haven't the time to discover other ways to do what I have used them for for years now. I'm afraid I'll have to revert back to 21.04 if Gnome extensions are gone for good in 21.10.