I tried installing extensions through gnome tweak tool, manually through the .local/share directory and also through ppa when I can but still can't see the extension on the panel. Any thoughts?
Try checking the version of Gnome Shell set for the extension. In metadata.json file in the folder of the extension, find "shell-version". It's one of the most common reason extensions won't work. To get version of Gnome Shell, "gnome-shell --version" in terminal. Try installing the looking glass extension to find the error message if the above didn't work.