Are you running Android 9 or the Android 10 beta?
Same problem but doesnt work bluetooth either could use a date where this will be resolved now...I upgraded to s10plus to lose support why?.. Android 10 one u.i2 seems like it could be the answer but when is that due to be released ???
Regular S10+ firmware from ATT I couldn't participate in the beta , my Xbox controller connects to my S9+ via OTG perfectly but the S10+ only wants to Charge the controller can't change usb settings either I'm trying to use it for Xbox Game Streaming , I don't have a Bluetooth controller