It is possible with edxposed and GravityBox module.
Note: Gravitybox doesn't go well with heavily modded UI like Samsung, Huawei etc. So check the XDA
thread, for your device specific issues and fixes. It may or not work.
Installation instructions for EdXposed (though it's for Android 10, it is applicable for Android 9 too as far as installation of EdXposed ...
Google family subscription can cause your Play Store to not recognize a new area you are in. I suppose it has to do with certain group permissions such as sharing Play Store settings and app versions.
Anyway, after quiting the Google family group I was in, my Play Store showed the apps I needed.
The tab queue is sadly gone from the new Firefox.
There is a feature request here but it's ignored:
You can uninstall the new Firefox and then install the old version's apk from here: