Thanks for the help, James.
Unfortunately, none of the functions that start with “acf_” are present in any of the code anywhere in my theme directory. As well, I don’t see a json directory either. What else could be going on here?
I am baffled as to how these fields / groups were created. And, as such, quite roadblocked in creating this system anew for another web project.
Any further help much appreciated. Thanks.