As a follow-up to this update, I got Mapbox setup on the frontend only. Setting it up on the admin dashboard is…a little more complicated. I might have to wait till the plugin devs add Mapbox as a provider or show us how to set it up ourselves. I see that there’s a feature request on ACF’s message board made earlier this year, so hopefully, maybe we’ll get something like this sooner than later.
(I know about the add-on by WPBees, but want to try free alternatives first.)
In the meantime, I won’t be able to use maps for photo posts for now.