It is supported in the sense that the ACMESharp library was written specifically for that purpose -- the PowerShell module that comes with it just happens to be one of the clients that uses that library. There are at least 3 other well-known projects that use it for that purpose as well (Certify and lets-encrypt-win-simple, which you can link to from the ACMESharp home page).
However, yes the docs for this purpose are skimpy, while I would like to contribute more on that front, I'm constrained on time so it's something that will come in the future. You can take a look at the code for some of the other projects that use it to get a better idea of how to use it.