Please also try to disable "Enable HD" in Video settings and also change "Video Rendering Method" to Direct3D11 in "Video-->Advanced" in addition to disabling hardware acceleration. Note that you need to restart Zoom after making these changes (kill it in the Task Manager or logout and then log back in).
I had two long Zoom meetings on my Surface Pro 7 without issues today. My CPU is Intel i5-1035G4@1.1GHz.