Unfortunately, there is no difference between a TCL Roku TV and a regular Roku streaming stick or set-top box when it comes to getting a web browser. To obtain a web browser on your TCL Roku TV, you will need to employ techniques similar to those I have outlined in this piece, like casting or screen-mirroring.
More help - https://webinkeys.com/roku-internet-bowser/
More help - https://webinkeys.com/roku-internet-bowser/