I've revised my postal installation and now it's complete. I've tried to know what it looks like when I enable click & open tracking. So I followed instructions and setup domain, fast server, let's encrypt etc. All good, except only open tracking is working. When I click on links in email, click tracking is not working. My email's urls were rewritten with click.mydomain.com which looks like working as intended. Everything looks like OK, but click tracking is still not working.

When I open email, it adds opened label on email. So I assume if click tracking works, it would add 'clicked' or something like that ?
Edit: I'm sending html email.
I don't think they add a tag for clicked.
But if you open one of those emails (click one of those two rows your screenshot is showing), their is a tab called Activity, and that shows the clicks in there.
Also, you can setup a Webhook to happen when the MessageLinkClicked so you can extend in your own way.
I thought there was a tag but apparently I am mistaken.
You can see that a link was clicked in the Activity tab inside the message or by webhook as mentioned above.
Thank you, I see that they clicked things on activity tab. But I'm leaving this issue opened for the sake of tag implementation if ever happens.