Recently, I noticed that time to time my client is unable to resolve my domain name. I have a Lightsail instance with a static IP, a Lightsail DNS Zone, and finally a Route53 domain name.
The only thing I did for now is adding the Lightsail DNS Zone name servers to the Route53 registered domain name servers list (as described here). I currently don't have hosted zone on Route53.
I have three questions. First, is the other way around more scalable? meaning, should I have a hosted zone on Route53 pointing Lightsail static IP (like this). Second, Is there a domain name access quota that I'm not aware of? and finally, Is there something flagrant that I'm doing wrong (I'm a newbie in networking).
Edit
As mentioned in the comments, if someone could help me check if the public records are setup correctly or tell me how to do it, that would be great
Domain name: yimaru.services
Static IP address: 3.121.169.168