Bazzite resolution question

So I've been using bazzite on and off for about a year now, love it, has a few quirks with specific hardware but it's great.

I have a question about my resolution, however.. PC specs ( 9800x3D, 7800XT) back when I had windows installed and the PC hooked up to my LG oled tv, 1440p 120hz worked fine, but in Bazzite I can't enable 1440p at all, in gamescope or desktop mode..The TV just says unsupported format. it's a rather old LG OLED TV, but I had no issues with 1440p 120hz on windows (does 4k 60 and 1080p 120 too), I've Googled a bunch over the last few months, can't really get to the bottom of it and thought I'd ask here, thanks