Is this video accurate for your car? Looks like it should be. The filter in question at the 20:30 time.
It doesn’t appear the bolt has any sealant whatsoever on it so the chances it actually seals anything is slim. It also appears threaded the entire length but only engages toward the end based on the limited loosening before it falls out.
The filter housing does appear to be quite tightly held in place by the “grommet” around the neck.
I would mark a wire at the length of the bolt so you know how far it can reach up into the threaded hole. A slight bend, piece of tape, marker line etc. Then insert the wire into the bolt hole and see if it goes in further than the mark. If it hits a stop close to the length you know it’s a blind hole.
I might be tempted to find something very close to the original bolt but just a hair larger. Goober up a tap of the right size with vaseline and run it in/back out. The vaseline will capture any chips or shavings. Then carefully thread in the new bolt and only tighten a smidge so it doesn’t want to back out. Your tolerance for risk may be different…