Iphone 17 pro - wifi calling.

I just joined Lebara. Got a text message (below) to set up wifi calling. But these menu items are not on my phone - IOS 26.3. - Disappointing they cant get this right. Anyone?
”Important - We've detected a change of phone. Please follow these instructions to use internet on your new phone.
1-Go to SETTINGS on your phone
2-Select MOBILE DATA and then MOBILE DATA NETWORK
3 Under MOBILE DATA set APN as uk.lebara.mobi
4-Set both Username and Password as wap
5-Scroll down to PERSONAL HOTSPOT and set APN as uk.lebara.mobi
6-Set both Username and Password as wap”

I don’t have volte or WiFi calling on my iPhone 16 pro max I don’t think lebara support iPhones

Chris250 Lebara do support WiFi calling. I checked before I joined.