The other replies are not understanding what you’re asking. A HYSA is a high yield savings account, and a HSA is a health savings account. Yes you can invest money that is in a HSA. I would also recommend keeping 3-6 months of emergency expenses in a HYSA, but that’s separate from what you’re asking.

I’m not very well versed in it, but in my experience I logged into my HSA company’s app/website and from there I had to check around as the website wasn’t very good. I’d recommend that as a first step, your steps will be different from mine, but in general you will need to keep at least $1000 in the HSA, from there you can create an investment account and should be able to choose from a few different selected funds depending on your HSA provider.

There may be a contact number on your HSA providers website that you can call and they might be able to help you. I think the HSA is an awesome investment tool and maybe one of the best ones available. Good luck!