How come 3rd party apps can't use the built in radio antenna?

[danoga]

This is the only app I know that actually uses the FM radio antenna but it says it doesn't have access to the antenna.
https:// play.google.com/store/apps/details?id=com.nextradioapp.nextradio
I'd use the built in one but the icon won't show up in the default launcher.
I've been looking for custom launchers already since the default one doesn't have a horizontal mode but haven't found one I like yet.
So let me here your recommendations for custom launchers, Tasker, Termux or ways to add icons that launch hidden apps.

[danoga]

Alright found how to do it. I only wasted 4 hours.
Install Termux and Termux:Widget
https://f-droid.org/en/packages/com.termux/
https://f-droid.org/en/packages/com.termux.widget/
Download an icon you want to use, 96x96 works good
Launch Termux and run
mkdir .shortcuts
cd .shortcuts
echo "am start -n com.asus.fmradio/.FMRadioUIv3" > "FM Radio"
chmod 700 "FM Radio
mkdir icons
mv /data/data/com.termux/files/home/storage/shared/Download/YourIcon.png ~/.shortcuts/icons/"FM Radio.png"
Return to the home screen and hold your thumb where there's no icons and tap Widgets. Scroll down to Termux:Widget and select Termux shortcut. Tap FM Radio and then drag the icon to where you want it.
Here are a few icons I pulled out of the FM Radio app you could use
https://ufile.io/f/4t6ec