It is easy to add antenna channels to the Favorites list on your TCL Android TV.  

• First, make sure you are on the Antenna TV Input options.  Click here to view steps on how to change input options.
• Press the OK on the TV remote
• On the left panel, it would display all the available antenna TV channels 
• Press the ▲/▼ to scroll up and down, select and highlight the channel you want to add
• Press the virtual keyboard icon
• Press ◄/► to move the cursor and select the green-colored block - as shown in image below.