I made a mistake in the /etc/fstab how do I edit it from a live boot usb?

The partition structure is a little funky with Bazzite.
I was removing a hdd and replacing it with a bigger one, but I don't think I properly removed the old entry from fstab, so now my os refuses to boot. With other linux versions I can just mount the partition from a live usb and fix it, but I'm not exactly sure how you do that with Bazzite
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