https://opendaw.studio/
That looks to be it although I am on my phone and it doesn't fit on my screen.
It's a neat idea although I don't see anything indicating it supports VST and I'm not sure if it is even possible in a browser app. I'd need that for it to be useful.
My hope would be that being open source would lead to decent information about how to use it. I have Bitwig but there isn't much documentation out there and a lot of it you have to pay extra for.