Screen resolution - use hdmi to vga,how to do it?

i use hdmi to vga I bought a BPi M4 a week ago and I’m continously struggling with the display. There is NO WAY to change the screen resolution, it’s stuck at 1920x1080. I’ve downloaded all the available kinds of linux distros for M4 and nothing works.

kernel initialize display with a predefine 1080p edid if it can’t detect the monitor edid or the edid is not support.

can change to 720p?and, how do?