I’d definitely check Rtings before you do anything, LGs are actually very good when paired with a PS4 but that one is a bit older. Other Monitors or TVs are much better on PCs or higher quality devices like the PS5 will be but the PS4 runs at 60hz which is basically LGs quickest setting on devices. My LG monitor has under 10ms input lag at 60hz which is very low and hard to upgrade.
You should be able to check the back of your TV and search the funky code on Rtings. Then look for input lag not response time. Then look for Input lag at 60hz (PS4) and input lag at 4K. Some are good at one or the other, some run quickly on both.
They literally have sections for best PS4 monitors, TVs, cheapest, quickest, everything is there.