VM don't provide the airwaves your connection utilise, it's Vodaphone.
If you have a 5G phone and a 5G enabled contract you should be able to receive a 5G signal if there's one to be found.
If you're anywhere near my local South London Tescos you might be able to hear me squeal with excitement when I notice I've picked up 5G and run a speed test, top floor of the house, sometimes - ground floor, not seen 5G as yet so it can be very area/mast provision dependent.