Welcome to Vodafone Community
Have you considered Skype or any other relevant app to video call.
You can video call via Facebook Messenger too.
From what I can see from past posts etc it's not native to Vodafone via the calling app @Phil-ynwa
Look at 》
Current Phone > Samsung Note 10+ 5G _256Gb > Model: SM-N976B.
Samsung One Ui 2.1 / Android 10.
Samsung Gear s3 Frontier Watch.
Samsung Galaxy Buds.