Issue with iframe form for making booking in mobile view

Issue with iframe form for making booking in mobile view

Hello,

I have an issue with an iframe form I have embedded to make appointment. On mobile it covers the full width and im not able to scroll up and down when navigating inside the iframe. 

Do you have any solution for this?

Url to site: https://bm-health.consulting/kontakt/ -> please check mobile view

Thank you,
BM Health