I got fed up with my touch screen OTA updates never working, and sometimes slow button presses, turns out the placement of the board against the metal case ruins the wifi signal. After a bit of experimentation, I made a bracket the moves the board away from the screen, and now the wifi works perfectly.
Thought I’d share for anyone else with the same device.
https://makerworld.com/en/models/2080418-waveshare-7-wifi-mount-fix