Shared tab not finding contacts

I’m trying to add two contacts to a shared tab however they are both not coming up on my contact list. I’m able to create the tab and add other people but these two contacts just don’t appear. When doing “nearby” it says “something went wrong, unable to add participant”.

They are both my parents saved on my phone as “mum” and “dad” I’ve changed the contact names on my phone to the names as they appear on their Monzo accounts but they still won’t show.

Please how can I resolve this?

Have they shared their permissions in their apps to be visible to other monzo users? Check their privacy settings.