Sure, here’s my Roku Stick+ doing it. TV Guide, six across on the top of the screen from Home, just before Settings.
Only Now & Next in the TV Guide, but you can get a Sky app that shows all the programmes.
Set a Payment PIN on your account so that no-one but you can buy memberships on it. Check your bank accounts monthly for any other unexpected payments to Now. That way you can at least nip them in the bud, while you and Now figure out whose fault they are.