We're grateful to have you here in the Roku Community, @Pellet3644!
No worries! We're here to find you the best resolution possible.
In this instance, have you fully activated your new TCL Roku TV? If so, did you log in to your TCL using the same account as before? Using your existing Roku account will help you access your installed apps that are on your old Roku TV.
In the meantime, you can refer to our Support article to help you install apps on your TV.
We'll be anticipating your response. Hope this helps.
Best regards,
Carly
Carly Y.
Roku Community Moderator