Based on this answer from John Huebner: https://support.advancedcustomfields.com/forums/topic/query-repeater-field-with-two-values/, I determined that this wasn’t possible.
So, I went the route of hooking in with a filter on acf/save_post to add a query-able post meta key based on the repeater field data, as detailed here: https://support.advancedcustomfields.com/forums/topic/sorting-admin-column-with-repeater/
