In carry, it's a bit ridiculous.
In practice... I've got something down. Last night I installed a local ntfy server and linked sms/mms notifications from my Android to it, then linked the OP6T to the ntfy server. Now I know when I get an SMS on my SIM card. I intend to do the same for calls.
I need to go bug someone on Postmarket's team to throw KDEconnect in the repository. That would make this chef's kiss.
Now I don't need to remove the Android from my pocket unless it's to run music in my car. Luckily enough, my Pixel Buds love my OP6T but my 2014 car thinks it's a headset. You gotta love the bad-bluetooth years, and no AUX so I can't pair to a dongle, either. It's FM transmitter, tear my dash apart and get Dexter's Lab with it, or the Android.
Ubuntu Touch is also something of a curiosity for me for one reason, it has somewhat of a virtualization layer for some of the devices on the phone to run on the Android drivers or somesuch magic. Apparently UT has the camera and lots of other buggy things working, but it hasn't been updated on the 6T since last year.
They know a duck when they see one, and he ain't no duck! He's a fascist.