My 2018 iPad Pro used to disconnect every time i put my hand on the upper righthand corner of my iPad in landscape. I recently upgraded to iPad Pro 2020 And don’t have this problem. The 2018 still does though i may take it in before warranty runs out.
If you all are on Xfinity, I had connection issues with my Xfinity router/gateway on all my wireless devices. It just happens that a majority are Apple products.
Only recently did they fix my issue as it was the source instead of end user issues.
by any chance do you have a VPN installed? Mine used to drop because the VPN for one reason or another disconnected me and once I disconnected VPN Wi-Fi reappeared without issues. Just thinking out loud.