I regularly post from my phone usually running the latest iOS
So far the forum has worked as expected and I haven’t had unsupported features
When I want to make super detailed posts like the radio restoration posts I do those on macOS
If I ever were to run into an incompatibility I would search who to contact and let them know
I suspect there are a few other users like me using different platforms so as long as the folks that run the site take feedback this whole place will get a thorough interoperability vetting on a regular basis
-s