Ah ha! I was looking for those options under the “+ See more options” for each included taxonomy. I was assuming the change display mode button was going to change the way I could find the taxonomies I wanted to include. Thank you for pointing this out.
The filter checkboxes that are displayed for custom fields work differently than the taxonomy ones. They all start unchecked, but filting is not active at this point, and once you click one, filtering begins and results are narrowed. But with taxonomies, starting with them all unchecked, filters the results down to nothing right on page load. But for now I am able to just active the ‘select all’ checkbox, which allows the user to first disable all filters, and then select the one they want to filter, which I still find slightly cumbersome.
Thank you so much for your time, and thank you for the insight on the ACF issue, you have confirmed my suspicion.
I may actually be out of questions for you, thanks again for everything. I’ll send you a link once the system is live in case you would like to check it out.