on android whenever i connect my switch to my tv it always appears cropped

i've tried using this thread from the old subreddit for help but it doesn't do me any good because my tv doesn't seem to have any of the settings it's referring to

i'm trying to root an install of android 11 on my switch using magisk but i can't figure out where the boot image is so i can patch it

i think i need to dump it or something but i can't seem to figure that out either