IPad eSIM doesn't get SMS - can't setup the app

I've just added a new eSIM to an iPad - and by design the iPad doesn't receive phone calls or SMS, it is data only.
I've made myself a login for the Lebara app, but when trying to add the phone number to my account I'm stuck as I can't receive the verification SMS code. Any suggestions?

Hey TonyD1 are you able to activate the SIM in a mobile phone and then transfer it to your iPad?

Martin thanks for replying. I don't know if I can temporarily move a Lebara eSIM to another device and quickly back again - that might well be the sort of thing I'd need a fully functioning account for!
As well as posting to this forum I did also use the Lebara support chat who were very helpful and told me they escalated my request for further support. However, only tumbleweed since so I guess someone is staring at a growing stack of these trying to create a new process.