Gnome 42 on Ubuntu 22.04

[verndog]

Top Panel transparency not working

[Batwam]

Is it "not working" (you downloaded the sources but it doesn't work) or "not available" (can't download from the Extensions website)? For info, I noticed that the Blur my Shell extension does happen to make the top bar transparent so that might be a good temporary solution for you depending on what you are trying to achieve. Technically, it is actually transparent with blur by default but you can also go into Panel -> Customize Properties -> Sigma and set as 0 if you want full transparency

[johanla0]

I'd rather say it conflicts with the other extensions, for instance 'Blur my Shell' (even if the last one has disabled settings for the top panel).