Webflow form submission GDPR

I host sites for clients on webflow and using the form submission on webflow. With the submissions also being saved in webflow, how do i know Webflow fully comply with the GDPR?
I believe this also makes me a data controller right?
I just want to know how i can inform my clients about this.
Thank you

Check at this article, it can help you with all the GDPR thing: