Hi @digitl An extensive filter only seems to be on Freeview Play which is not currently available via Samsung. otherwise can search favourite channels. see more information here https://www.freeview.co.uk/help/find-programme-watch-live-demand There is a mobile app though.
This is my Freeview results though as I have Sky some time since I used the service. https://www.freeview.co.uk/get-freeview/results
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 5.0,Android 13 .