'How long does it take for AWS Amazon Inspector to complete a full EC2 Scan?

I enabled AWS Amazon Inspector (2) for a single EC2 instance that I have. It's an ubuntu with php and apache, nothing special, and the status shows Scanning for the last 3 hours.

I look at the htop of this machine, and I see that the /snap/amazon-ssm-agent/####/amazon-ssm-agent is running and that several /snap/amazon-ssm-agent/####/ssm-agent-worker are running. Still.... 3 hours passed, and I have no results.

Is it working? isn't it working? is there a more verbose status? Also, if someone have experience with this, can you share the avarage time you waited for results?