Security update of the machine's Ubuntu

[Dont-Worry]

Every time I connect to SSH on my machine, I realize that I always have these updates that are there, these 19 updates that could be applied immediately. When I run apt list --upgradeable, what happens is that I see that I have 9 urgent security updates. I know that I am not supposed to update by apt, but I wanted to know what it was about these security updates.
Am I really supposed to not update theses ?

Because I saw that Cloudron was supposed to do the security updates automatically, but when I updated my Cloudron for the last time, it obviously didn't do it.

I tried to look for the answer in the forum but I found nothing on the updates of the OS of the machine that supported Cloudron. I only found things regarding security updates that concerned applications but never on the OS of the machine. That's why I'm asking myself the question here.

[girish]

@Dont-Worry security updates should be applied automatically. This is actually a feature of ubuntu itself. Can you check /var/log/unattended-upgrades/unattended-upgrades.log to see if there any errors?

[girish]

You can also check apt list --upgradable | grep security if those are actually security updates.