The system launcher on my phone has a data usage that is non-zero. I’ve already disabled background data for it.

I use Lawnchair2, but haven’t tried to disable/uninstall the system launcher because I’ve read somewhere that it affects gesture navigation(Is it actually so?)

I know that apps like Netguard can help, but is there a more direct solution, other than rooting?

Are there any other adb commands that are useful, hopefully that are not too dangerous?

I’ve recently found
adb shell pm trim-caches 99999M
Clears all/most app cache, without having to install some cache clear or use Gfiles. I don’t really use it often.

Along with this, does anyone know way to troubleshoot gmail not being able to download attachments on mobile data? I’ve not disabled background data for that.
Or should I make a separate post on it. Or would it be too tech-supporty?