Hi @spikusmax - yes this is possible! But it requires creating a new farmOS module. It also requires that the layers you want to include are available as a hosted tile set.
Basically, what we need to do is create a module that adds the layer to the farmOS OpenLayers map.
I am currently in the process of upgrading the farmOS OpenLayers map library to make it easier to do these kinds of things, in fact. I hope to release that this month. See Starting work on farmOS-map library
Once that’s done, there will be some example modules included in farmOS that you can use to build your own. So stay tuned for a newsletter update when that rolls out!