Using Radio app

[jazz97]

How can I install samsung radio app on my s21 ultra 

[IBGS20U]

You can't use FM radio app on S20 or S21 in Canada. You can only stream from internet radio apps.

[Jayman1973]

There are so many radio apps available. Some suggestions would be Radioplayer Canada, tune-in radio. These apps allow you to download, install and listen to radio stations in Canada from British Columbia all the way to P.E.I, Nova Scotia, etc. I have tune-in on my S21 Ultra and am quite happy with this app.

[PigFarmer]

Download Samsung TV Plus ..... this app gives you access to Radio-Canada.ca.

[Halston]

Hey jazz97,
@IBGS20U, you are correct. The Samsung radio app is not available in Canada. However, you can install any third-party internet radio app from the play store.
You can also follow the suggestions provided by Jayman1973 and Note20UltraFan.
Thank you IBGS20U, Jayman1973, and Note20UltraFan for providing the information.