FaceTime unable to FaceTime video call
Hi- I have an iPhone SE- my mum has a brand new iPad but not an iPhone. Her FaceTime is set up with her Apple ID rather than a phone number. She can FaceTime video call me from her iPad to my phone but I cannot FaceTime video call from my phone to her iPad it only offers FaceTime audio call which is green and video is grey. Both fully updated, both have had gone and on/off buttons pressed at the same time. Any help would be appreciated, I miss seeing her face as she is in lockdown. Many thanks
iPhone SE, iOS 13