How to access Antenna channels without scrolling through Streaming Channels?
Go to Settings/TV Inputs on the RokuTV.
Under Settings/TV Inputs/Rename change the name of 'LiveTV' to 'Antenna TV'.
Under Settings/TV Inputs/Manage Channels select 'Hide Streaming Channels'.
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When you now want to watch your Antenna/local channels, select the 'Antenna TV' tile from your Home Screen. (You should now just have your Antenna channels visible with no Streaming Channels). If you want to watch the Streaming Channels, you can either select Live TV from the left side menu (if enabled under Settings/Home Screen/Live TV [Show], or through the Roku Channel.
Make sure those three settings referenced in the previous post are Enabled. Then try performing a System Restart on your RokuTV (Settings/System/Power/System Restart). Reboot the phone as well after enabling Wireless Display.
May also need to verify that there are no settings precluding devices from connecting to other devices (like client-isolation or firewall settings at router).
Been awhile since I used the Play Store apps, but I liked Miracast (by Vulcan Labs). They had an ad-supported free 'limited' version that worked for mirroring and casting. (ads were not too intrusive).
However, your Umidigi should be able to screen mirror to your RokuTV, so just have to try a couple different settings to resolve. (of course, make sure both phone and device are on same wifi network).
