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.
Same here, I wish they would acknowledge this problem and hire better Devs.
You need to contact Google. They own YouTube and provide the YT channel for Roku devices. Roku themselves have no control over it.
For the record, YT is working fine on my Ultra 4800, which is the only player I've tested it on. The YouTube version as reported within the channel under Settings/App Version is web_20210112_00_RC00. The version number listed on the Roku home screen (hit * to see the version) is 1.0 build 93000123
Dan 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.