Did you add them via your account on Roku's website? That adds them to your account but they may not download to your Roku device(s) until each device checks for updates. You can force a check for updates via Settings.. System..System update..Check now.
Roku Community Streaming Expert
I am not a Roku employee, only a user like you. Please, no support questions via private message -- post them publicly to the Community where others may benefit as well.
If this post solves your problem please help others find this answer by clicking "Accept as Solution.".
Streaming Stick 4K+ 3821 | Streaming Stick+ 3810 | TCL Roku TV 43S245/C107X