Domain registered on Route 53 not resolving properly

Hello.

I checked the domain's propagation check, and it certainly looks like it hasn't propagated to some countries yet.
It may take some time for the domain to propagate, so it's a good idea to wait a little while before checking.
https://www.nslookuptool.com/#A&diakob.io
https://www.nslookuptool.com/#NS&diakob.io

Hi,

Form Route53 FAQs: https://aws.amazon.com/route53/faqs/

How quickly will changes I make to my DNS settings on Amazon Route 53 propagate 
globally?

Amazon Route 53 is designed to propagate updates you make to your DNS records 
to its world-wide network of authoritative DNS servers within 60 seconds under normal 
conditions. A change is successfully propagated world-wide when the API call returns 
an INSYNC status listing.

Note that caching DNS resolvers are outside the control of the Amazon Route 53 service 
and will cache your resource record sets according to their time to live (TTL). The INSYNC 
or PENDING status of a change refers only to the state of Route 53’s authoritative DNS servers.

So, try to wait for a while for all 3p DNS resolvers outside of AWS Route53 to update.

Best,

Didier