

You can set up mount points on Linux, at least in GNOME, very easily. (It’s even fully automatic for external disks.) I’d be surprised if it isn’t as easy in KDE and other desktops too.
The problem here (at least from what it sounds like) isn’t setting up mount points. The problem is fixing an incorrect fstab on the disk that’s causing the system to hang on boot.
(This isn’t a typical situation, which is why I also asked about how the partition was added to the system.)
Literally almost all of my and my partner’s friends and coworkers who are in Europe (including Germany, UK, Finland, Czechia, Greece, and more) have been sick with COVID in the past couple months to (especially) right now — it’s very real in Europe still.
People are all talking about COVID right now, in messages, emails, video calls, Mastodon, and more. (It’s usually to inform others that they’re sick and can’t work or meet up. But also complaining that doing basic stuff is difficult.)
Europe is a large place, of course, but at least in a lot of it, COVID is sadly still going strong.