Could you precise which phone you have? FP1, FP2 or FP3?
I’ll suppose you have a FP3 turning under android 10. In this case, 
Don’t format your SD card as internal storage! As you noticed, it will break many features. See here for instance: Android 10 - MicroSD as phone storage. You can also have a look at the #sdcardguide for more details. Formatting it as external storage will cause you less trouble.
First, try taking your SD card away and see if your phone works as expected.
If no, I’m afraid you’ll have to reset the phone.
In both cases, once the card is inserted, you can reformat your card as external storage by going in Settings→Storage→SD card→Three dots menu→Storage settings→Format as external
You can also format it from a computer (e.g with GParted). In this case, format it as exFAT.
Don’t hesitate to ask further questions if you have any or if I wasn’t clear 
Edit: Typo