OTA not showing

I have tried all of this, and nothing has worked. The only time I can access my OTA channels is right after a scan. I have asked it to block the streaming channels, but they never show up. I used copilot to guide me through numerous attempted fixes and nothing has worked. It asked for the model etc. and when I entered it (it is a 15) it said it is a common problem. How is it fixed because it drives me crazy.