There's an app which can bring up the original android settings.
Take a look at this thread's first post, at the bottom, called "Android Shortcut Settings":
https://xdaforums.com/t/general-fyt...unisoc-ums512-q-a-mods-tips-firmware.4396339/
Use this to open up the settings and set the default home app, like you would set on your phone. (You can search for "default apps").
I wouldn't bother with updating those apps, I haven't noticed anything different after I updated mine.
I was using my phone's hotspot to share my internet to the headunit and I was able to update them. If it's not working, try restarting your unit, then trying again. (You can do so by pulling down the notification bar and select Reboot).