How to have separate scaling for two monitors on Pop! OS

I'm brand new to Linux, and I have installed Pop! OS to replace my Windows installation. Enjoying it so far, but having some troubles with high-res monitor scaling. My first monitor is 3440x1440 (21:9 ultrawide) resolution, and my other monitor is 3840:2160(4k). I want to have the ultrawide monitor be scaled to 100%, but I want the 4k monitor to be scaled to somewhere around 150%-200%. I noticed that in the display settings, I can turn on the fractional scaling, and set scaling separately that way, but when I do so, there is some weird behavior. I noticed that in games, I could set my resolution to 6880x2880. So after messing around, it seems like if I do the fractional scaling, it increases the size of my main monitor, which I do not want to happen, because then gaming is much more difficult performance-wise. So, I want a way that I can have separate scaling between the two that doesn't involve fractional scaling. More over, I tried to use an xrandr command that I found online, and it basically completely broke everything, and made both of my screens act crazy, and I had to reboot. So I'm not super sure that will work either. Any suggestions?