@Cupston
The Roku account owner can log into their online dashboard at https://www.roku.com/ or https://my.roku.com/account and change their pin.
After logging into the dashboard, it is located under Device Settings (Pin/Parental Controls).
Roku Community Streaming Expert
Just another Roku user... I am not a Roku employee.
Insignia RokuTV, Ultra 4660, Premiere+ 3921, Express 4k+ 3941, Streambar 9102