I don’t know. As an open source developer I put the onus on myself to make sure my releases (at the very least, not every commit) at least compile and run on Linux, macOS, WSL, and FreeBSD even though I don’t use the first two.
I mean... you just named two enormous platforms that you should test for but don't use. FreeBSD is hardly equal to either of those. It's a much much different situation.