Tried to get History channel...and and said it would show in my queue...but didn't
Where are you located? History Channel streamer on Roku is only available in the US.
Source: https://channelstore.roku.com/details/8291277e4c05f1db9ef286c60a60d8f7/history
I can't find any information on which Roku models History wrote their app to run on. What model and number to you have? (Settings > System > About)