No need for an MDM in my opinion as you can have it all with GOS.
I keep the home profile "Dumb" with phone and txt, which reduces overall privacy and security surface - no Google pollution, etc...
Then I have Personal (Gmail, Maps, YT) and Work (we use G-Suite) profiles that are polluted with sandboxed Google stuff. Behaviorally I have to INTENTIONALLY log in to the "smart phone" stuff only when I need it.
In a pinch, it is very handy to be able to fire up Google Maps as it's significantly better than OSM and the other FOSS maps.
I'm better learning the streets, I actually plan out drives (north to Main St, East on Main for 3 miles to Harrison, then north on Harrison, etc), and I'm disconnected from all the garbage on the mobile internet.