Welcome to Vodafone Community
With previous mobile phones on Vodafone I have set up and used my hotspot.
On my new Huaewei P10 Pro clients get connected but no internet connection is available for them.
I appreciate the Hotspot has worked with previous phones but it might be beneficial to speak with Customer service on 191 just to get this provisioned on your Account again.
Also over time it seems issues with Hotspot / Tethering seem apparent with different phones and os platforms.
Are you able yourself to connect to Mobile Data and surf on your Huaewei P10 Pro ?
It might be worth trying to delete the pairings / connection and try again.
Current Phone > Samsung Note 9 _512Gb > Model: SM-N960 Hybrid-Duos.
Samsung One Ui / Pie.
Samsung Gear s3 Frontier Watch.