AWS requires MQTTS with TLS 1.2 and client certificate authentication.
(upload of AWS root certificate, client certificate and client key to the gateway)
Is that supported?
If “yes” it’s a good chance that it will work!
If you want to test i can send you the certificates from my sample site or you can set up an own AWS IoT site for free
This URL describes the configuration steps needed in AWS IoT rather detailed.