There are mixture of numbers. Some requre localization like 2.27 GB but others like version 7.3.1, IP Address 172.10.2.11 do not.
Perhaps it is just a matter of setting locale in PHP (??) before requesting values like load, free memory, disk space? This way you don’t have to guess if a number needs localization or not?
The most striking error, because this is the first page you see after a successful installation is in
https://…/nextcloud/index.php
1.7 GB verwendet
So, while serverinfo has most errors, it isn’t the only place with this problem.