Bought a 75in 4k UHD LED Roku tv from TCL but I've recently noticed compared to my previous TV which is a first generation samsung 4k OLED from like 2016 that the roku tv is not displaying in 4k through the roku apps I can't find a setting anywhere in my apps or the roku settings (there is no display setting) and when you hit the star button while viewing an app/input the only settings are picture settings for color...not resolution or aspect ratio or anything to select 4k or hdr. The tv is up to date hard restarts do nothing and for comparisons I have played the same video on hulu on both TVs and the much older tv is displaying 4k while my roku tv is displaying what looks like 1080p... please advise