I do rideshare from my Android phone so have not installed iOS 11 on that. I dd install iOS on my iPad, but since it's not a phone, do not have Uber/Lyft driver apps installed on that. Have not used my iPad today, so don't know about other apps working OK with iOS 11.
Been running iOS 11 since June. It caused driver app not to show pax rating and “stop new requests” during an active trip. This was fixed in a near final beta released about 2 weeks ago. Been running the final version for a week and no compatibility issues with Uber app.