GDPR and the use of CDN

hello!
I live in germany and here the authorities are very strict about the GDPR. in a facebook group there is a discussion if IUBENDA complies with the GDPR. for europe yes the privacy-shield agreement has been declared invalid. so it is no longer allowed to send data to non-eu countries. if I use scripts from iubenda they load from a CDN. as far as I can see the CDN is from akamai. akamai uses servers in 130 countries, some of which are certainly outside the EU. 

so my question: how then can the use of iubenda be GDPR compliant?

since their solution looks very promising and i would like to use it, this point would have to be clarified for me in advance though.

i would be very happy to receive an answer to my question.

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