Hello there! You may try these following steps below:
- On your iPhone, open the Shortcuts app.
- Tap on the Automation tab at the bottom of your screen.
- Tap on Create Personal Automation.
- Scroll down and select NFC.
- Tap on Scan.
- Put your iPhone near the NFC tag.
- Enter a name for your tag.
- Tap on Add Action.
Also for the Visa app, may I know which application are you using? There’s usually a permission and access grant by the user to allow the NFC to be utilised. If it doesn’t work, try bringing up the passport that can connect with NFCs to trigger the NFC on Iphone. Hope it helps!