NBC says it wrote its NBC Peacock app for Roku to be compatible with the following Roku models (Check your model number via Settings > System > About):
(Current as of February 4, 2022. 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)
From <https://www.peacocktv.com/help/article/what-devices-and-platforms-are-supported-by-peacock>
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Streaming Stick 4K+ 3821 | Streaming Stick+ 3810 | TCL Roku TV 43S245/C107X
