It's an interesting topic, but real-life holy/mystic symbols are very diverse. What kind of symbols are you looking for? There is "astrological symbols" item on my long list of ideas for generators, this one I may try implementing one day :)
I think this is the one I was looking for: https://www.reddit.com/r/proceduralgeneration/comments/i17hn6/drawing_randomly_g...
Here is a couple more, they are pretty different from your example, but still related:
Unfortunately, the first two don't have any export capabilities.
These are all really cool concepts. Not terribly useable for my purposes at the moment. However, that last one might be useful for a few friends of mine doing some 5e worldbuilding.
Maybe I’ll get lucky and you’ll get the itch(haha get it?) to make a holy geometry generator for magic systems, who knows…