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It has not been tested in various different environments, or with different use cases or cloth types. Stuff like collision is often unpredictable. There's a file on the GitHub that lists known issues as well.
If you have some basic idea about physics simulation, or you're willing to learn, I'm sure you could adapt it to fix the issues you come across, but I cannot offer a complete package and guarantee it will work for a general case.

I just released an initial version on Github: Matusson/UCloth: Burst-based Unity cloth simulation (github.com)
Also the final version, as I won't develop it further. If you're interested, maybe it could be useful as a learning resource?

Not currently, but that is the intention. I need to fix a few problems and write proper documentation. I'm quite busy so I can't be sure when it will be done.

Thank you! I am hoping to release the code within a few months, and then you'll be able to use it freely, if it meets your expectations. If you have any questions that you'd rather ask in private, you can reach me at matusson.6105@gmail.com

Thank you for giving it a try! There's many improvements that will have to be made before it can be used for full simulation of clothing.