Hi @clemiep,
Thank you for your first post here in the Roku Community!
We understand you're having trouble finding the screen mirroring feature. We're happy to help.
Most of the time, your Roku screen mirroring starts working by only reconnecting the devices. Disabling and again enabling the Wi-Fi on your devices may resolve your issue. If you still fail to mirror, then set your TV screen mirroring mode to “Prompt.”
Let us know how it works, and we'll continue to assist you further.
Thanks,
John
John
Roku Community Moderator