The IVI-COM/C drivers for M8195A looks like it is not available anymore? It looks like MATLAB only supports 32-bit IVI drivers.. I found the IVI driver "KtM8195A", but does not work for MATLAB 2020 64bit.
So currently I'm writing my own MATLAB driver from VISA and it's painful; especially generating and uploading waveform via SCPI. The last resort would be to switch over to another language (which I'm OK with, but would have to integrate other instruments in our lab too).