I bought a new macbook pro m1 in December. Returned 2 days later after realizing that it only supports one external monitor and even found articles stating that ultra wide monitors were not supported on initial release. "Just use display link adaptor?" No thanks I don't want a 150$ adaptor that may or may not work with my current setup. Even with display link I've heard of displays flickering on initial startup or not starting at all in clamshell.
People saying the MacBook pro 16" might solve the issue but tbh I think this is apples way of pigeonholing users to either their desktop version or their laptop.