Ubuntu 22.04 LTS - Jammy

Works very well, updated kernel and packages. I had no issues connecting. This image is optimized for AWS. 5 stars from me.

All is running well - as expected - the only hidden hurdle: SSH Access.
If you had a standard RSA Key for your other instances, AWS always wants to use that first... don't. Instead create a new ed25519 key, start your instance with that and enjoy.

It's a terrible oversight that m6a instances are not marked as supported while it is supported for the Minimal Ubuntu 22.04 image.

Not sure why others had issues with SSH.
I was able to launch new image and SSH immediately with key pair I created during launch.

After several attempts configuring instances for arm and x64, it has not been possible to access the instance via ssh to port 22 with the user "ubuntu". We already verified the correct configuration of the security group.

Those who are unaware of the following change may find that they cannot connect to this type of instance with SSH. (It loses a star because this requirement was not apparent and required no little effort to uncover.)

With the 22.04 Jammy Jellyfish release, an older, vulnerable standard for SSH communication has been deprecated. That is an improvement in security, but it has consequences that can mysteriously cause grief to those who are not forewarned.

PuTTY 0.74 or earlier won't connect via SSH. (Upgrade to PuTTY 0.76 or later.) The current latest WinSCP (5.19.6) or earlier also will not connect via SSH, but version 5.20 (currently in beta) will.

On the plus side, besides being a very popular distribution, Ubuntu instances (along with Amazon Linux and Windows) are eligible for AWS Per Second Billing.
https://aws.amazon.com/ec2/pricing/

Of course, the Ubuntu LTS images get the additional advantage of Long Term Support.