Help & troubleshooting for channels on your Roku device, including adding/removing channels, logging in to, authenticating, or activating a channel, channel-specific playback issues, assistance contacting channel publishers to report issues, and adjusting channel-specific settings.
If that particular Roku device isn't supported by a channel, in this case Peacock, it won't install on that device. What model is it not appearing on? Model number please, not just its name. Roku has a bad habit of reusing names on different devices.
Dan Roku Stick (3600), Ultra (4640), Ultra (4670), Ultra (4800), Premiere (3920), Insignia 720p Roku TV, Sharp 4K Roku TV, Nvidia Shield, Windows 10 Pro x64 running Serviio and Plex on a wired Gigabit network.
The NBC Peacock app for Roku was written by NBC to be compatible with the following Roku models (Check your model number via Settings > System > About): (Current as of February 20, 2021. Check the source listed below for updates.)
Roku 2 (4210X model only) Roku 3 & 4 (model 4200X or later) Roku Streaming Stick (model 3600X or later) Roku Express/Express+ (model 3900X or later) Roku Premiere/Premiere+ (model 3920X or later) Roku Ultra/Ultra LT (model 4640X or later) Roku TV and Smart Soundbar (model 5000X or later)