Ultra wide display appear to be stretched

Hey y'all, I have a Late 2012 Retina MacBook Pro running MacOS Sequoia with OLCP. It has HDMI 1.4 Port. Doesn't it support ultra wide resolutions?

Neither settings nor software tweaks appear to help me with that. Maximum resolution is 1080p 16:9, no other ultra wide options present. Is it the specifics of a MacBook port, or something?

Display is Mi Monitor 21:9 FullHD