Hello, do I need to do anything for this to get approved?

Wait patiently. I'm the only active reviewer that's volunteered to do this, and I only have so much free time.

Any subclassed GObject where you override a function like `_init()`, you must chain-up in that function with `super_init()`. If you removed the signals on your class `GTKTBWindowManager` because they were throwing errors, this is why that is so. Approved.

Sorry, I was not sure if I needed to let someone know. Also, thanks for the heads-up and I'd love to help you if you want to. BTW, I am still learning how this site works. Afaik, there is no documentation covering it.

If you're interested in helping review extensions, you should contact someone with administrator access to the site. Probably the best place to ask would be at https://gitlab.gnome.org/Infrastructure/extensions-web. You should have enough experience with extensions and GJS to be able to determine if an extension is doing something purposefully malicious or will cause considerable instability in the Shell. Currently, there is no documentation for the site itself, but it should be mostly self explanatory. If you wanted to contribute a guide that we can add to the site, that would great, and you can also submit that at the repository listed above :)