No Vodafone 5g anymore

I have a Motorola Edge 50 pro since February. It is a 5g handset and 5g has worked fine until now. I noticed that preferred network type is greyed out so I can't select it anymore. It's stuck on (4g & 3g & 2g). I don't know if it's a Vodafone issue or a phone issue. My wife is Vodafone also and her Samsung Galaxy A54 phone doesn't have 5g anymore either. I can select preferred network type on her phone and it is set to 5g. I've tried the phone in different counties and it's still the same. My phone has an esim.