I sent an email to TCL support and they were able to provide guidance which led to me resocoing the problem on two of my TCL flat screens.
On july 22,2024 here was their suggested trouble shooting steps:
To prevent your TV from channel loss when turning OFF, consider the following steps:
Manage Live TV Settings: After rescanning your channels, go to Settings > TV Inputs > Live TV > Manage Channels and check the option to Hide Streaming Channels. This may help in retaining your antenna channels without interference from streaming options
Also if you want to access your local channels without scanning it over and over again, just go to Settings > TV Inputs > Manage Channels > Rename and then rename this Live TV input to "Antenna" or whatever you please.
If it still is not showing on your home screen, go back to Settings > TV Inputs, scroll down to Inputs Not Being Used, and select Setup Input. Please note that it is labeled as Live TV by default.
Whenever you want to watch your antenna, over-the-Air, or local channels, make sure you select on your home screen the Antenna input or whatever you renamed it to. Do not select Live TV from the left-side menu because that is for streaming channels only.
Try placing your antenna in different places, including the cable that connects it, as that is part of your antenna as well.
Manual System Updates: Regularly check for updates manually without allowing automatic updates. You can do this by navigating to Settings > System > System Update > Check Now. This way, you can monitor updates and decide when to apply them based on user feedback regarding their impact on channel loss