I guess it depends on the "gaming" features if the tv has any, they could be minimalistic, adequate or completely missing (often the case with non-smart budget tvs). stuff like refresh rate (120hz or just 60hz), input lag are definitely important, hdr and panel type (oled/ qled etc.) and those vary from brand to brand & from model to model..
Also tvs are just like phones, there's the flagship models released each year (they usually cost atleast $1000, definitely more at launch), and the budget line which go around the ~$600/700 mark, depending on where you live. Definitely do your research before choosing/ buying, depending on where you live, you could find some good deals on last year's models. just know what you're looking for in a tv, as well as your budget, to narrow down the window..
And last but not least, expensive doesn't automatically mean that it'll be better.