French digital TV ( Télévision Numérique Terrestre) certainly still exists - and if Sue hasn’t got a good enough Internet connection for the Orange TV service (or a 4G package which includes TV) it might be the way to go.
However there is a bit of a catch-22 if you want both French and UK TV including digital services such as Amazon.
A UK TV will happily receive French TNT - but all the channel numbers will be wrong because it does not understand the French EPG
A French TV will have the French versions of Amazon & Netflix - which need separate subscriptions (certainly Amazon Prime is separate, not sure about Netflix) which might not be what Sue wants.
From Sue’s preamble I assumed it was a UK TV that they had brought with them - worth Sue confirming which nationality the TV thinks it is.