Nowadays few Samsung phones have an FM radio,obviously some will mis it but customers predominantly do not have an issue in using an app. See some information here https://bestradios.co.uk/which-samsung-phones-have-fm-radio/
one review of the best radio apps here https://www.androidauthority.com/best-radio-apps-for-android-393884/
I do not work for Samsung or make Samsung Products but provide independent advice and valuable contributions.
My Device- S21 Ultra 5G ( SM-998B/DS ) CSC= BTU , 12GB/256GB
One Ui 4.0,Android 12 Official Version.