Approval for SSL cert through ACM

Hello.

"elasticbeanstalk.com" is a domain managed by AWS, so it is not possible to issue an SSL certificate with this domain.

To issue a certificate with ACM, you need to purchase your own domain from Route53 etc. and issue an SSL certificate with that domain.
https://docs.aws.amazon.com/acm/latest/userguide/gs-acm-request-public.html

Alternatively, it is also possible to issue and register a self-certificate for "elasticbeanstalk.com".
However, self-certificates are not recommended for security reasons.
I think the following blog will be helpful for issuing a self-certificate.
https://zuqqhi2.com/en/generating-self-signed-certificate-and-applying-to-aws-alb
https://medium.com/@chamilad/adding-a-self-signed-ssl-certificate-to-aws-acm-88a123a04301