Just assuming that you're instead referring to a
TCL Signa 5004s phone, that's a relatively low-spec, budget-class model with only 2GB of RAM and a GPU with only mediocre performance. This is a daily usage phone intended to be used for things like checking email, test messaging, and those level of tasks.It is not a gaming phone so set your expectations lower. You're simply not going to be able to force this phone to do what it's not capable of.
https://phonecurious.com/wp-content/uploads/2020/11/TCL-Signa-User-Manual.pdf
At best, restart your phone and then be sure to close any apps/services that auto-start themselves (Google apps are notoriously doing this). Then start up your chosen game and fingers-crossed it's playable. If it is, you'll need to go through that entire process again each time. If not, you really have to rethink your options and either keep this low-spec phone but not be able to play those games you want on it, Or start playing other games that don't require a significant amount of system resources. Or accept the fact that you do need to buy a new phone that just works as is.