I completely agree. This definitely seems like a problem where some of the WordPress core code is not compatible with PHP 8.2. Many other people are using WordPress on PHP 8.2 without problems, so updating to a new version should do the trick.
You can do so without access to WordPress itself. In fact, the safest way to update doesn’t involve the WordPress admin in the first place.
If you used the Softaculous installer to install WordPress, you can also use it to update WordPress. In the list of installations, it should show you the option to update.
If Softaculous isn’t an option, you can do a manual update instead. The process on how to do that is described on the official WordPress documentation here: Updating WordPress – Documentation
If you’re looking for documentation that’s more specific for our hosting, know that the process to update WordPress is actually quite similar to what we wrote here: How to fix a corrupted WordPress installation