The thing is, I’ve got other websites running the same setup, but from a different domain, that works just fine. But this one, for some reason, doesn’t behave nice…
While the local access works just fine, the access through the domain, does not work fine.

Here’s how it’s supposed to look, and how it looks through the local IP address:

Here’s how it looks through the domain:

So the styling is missing for some reason.

As of today (5th of september 2022) I think the reverse proxy is causing it for some reason, since I tried disabling the SSL, and the issue still appeared through the domain.

I’ve tried:
A different certificate.
All settings available to me.
Rebooting the reverse proxy.
Tried a differnet theme just to rule it out.

All of the above, without changing the result.

The issues was within WordPress:
Go the to the admin panel.
Mouseover “Settings”, then “General”.
And change “WordPress Adress (URL)” and “Site Address (URL)”, as shown in the picture: