FWIW I've used Skype with various BT speakers(Including W-King) and BT headphones(Including Bose QC35), on a few different phones like Oppo, Samsung and Huawei with various Android versions, and never had a problem. And have also used Zoom with Huawei Mate 10 running Android 10, and again no problems with BT headphones and BT speakers. Have also had video calls with WeChat as well, using BT devices, and again no problems. Duo I don't know, never used that.