After update my note 9 to android 10, I have some issues:
1) I can't use Bixby to unlock my phone, the setting for this has been disappeared.
2) A very serious problem to use voice message in WhatsApp when you use full screen navigation gestures. When I want to swipe up the voice button in WhatsApp, my phone think I want to use back key!!!!. Or suddenly Google assistant will appear instead of voice message
Start with the standard trouble shooting list I would think..
And as a matter of idle curiousity, who is your carrier and where are you located? Country/State?