@Gussy512
This was a recent develoment addressed in Known Issues/Issue Tracking Board a couple of days ago
https://community.roku.com/t5/Issue-Tracking-Board/Channel-tiles-missing-from-Home-Screen/m-p/910736...
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If the steps in the solution posted over there (clearing cache, restarting device) did not work, I believe Roku is indicating a Factory Reset may be necessary. (Settings/System/Advanced System Settings/Factory Reset) or press and hold reset button for 30+ seconds. **Make sure you have a working physical Roku remote before performing a Factory Reset on a RokuTV or Roku device.
Roku Community Streaming Expert
Just another Roku user... I am not a Roku employee.
Insignia RokuTV, Ultra 4660, Premiere+ 3921, Express 4k+ 3941, Streambar 9102