I think there is bug in AWS Repo

Provider: AWS

Virtualization Type: HVM

System: Ubuntu 20

Installation option: since during the installation.
there will be few option to choose,so please provide it as well.

OLS or Enterprise?
OLS

Installing from official server or mirror server?
AWS Marketplace

Install Memcached extension for PHP?
yes

Install LiteSpeed Memcached?
yes

Install Memcached?
yes

Install Redis extension for PHP?
yes

Install Redis?
yes

Problem:

There is problem in issuing Mail server SSL.

I have Solved this by unintalling devecot, then Reinstall it,
Then this issue is resolved.

And also i checked through the Official Link, there is no issue.