Log into your Roku account at https://my.roku.com and set a PIN. Then choose where the PIN will be required. You can require a PIN to add a channel, but I don't know any way to prevent removing one.
Roku Community Streaming Expert
I am not a Roku employee, only a user like you.
Streaming Stick 4K+ 3821 | Streaming Stick+ 3810 | TCL Roku TV 43S245/C107X | Streaming Stick 3600
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