Alternately, you could use the Roku app installed on an iOS or Android phone or tablet. This will allow you to use it as an alternate remote for any Roku, both Roku TVs and separate Roku streaming devices, that are using the same local network as the phone or tablet. The app controls only one device at a time, and can be switched back and forth among them.
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.
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Streaming Stick 4K+ 3821 | Streaming Stick+ 3810 | TCL Roku TV 43S245/C107X