Multi Category Listings

I need the advanced search filter to feature 4 dropdowns:

STEP 1: I am a:
– Patient
– Case Worker
– Family Member

STEP 2: I am seeking:
– Doctor
– Nurse
– Pre Med

STEP 3: Within:
– The Home
– A Hospital
– OutPatient Facility

STEP 4: Age Group:
– Child
– Adult
– Senior

Each listing may be available within each Steps options. I first tried to create custom post types (CPT) for Step 1, but realized that they were self contained categories. I tried tiered categories, but then child categories do not produce a second dropdown, rather a nested outline.

I realized I would need to create custom fields for each options. Ideally, i could have checkboxes for each listing that would have each Step option included. So I:

– Go to GD > Place Settings > Add Multi Select
– Include this field in advanced search : Yes
– Advanced Search tab > Add the Multi
– Go to Places & choose the checkboxes
– Then look at the front end, the ​new Multi Select is not there

Soon discovered “Select custom fields can also be added to the search bar – but only Select, not Multiselect or any other, they can only be added to the Customized Search section as explained above.” found here: https://wpgeodirectory.com/docs/gd-search/#select.

If i add a Select instead of multi select, within the listing i can only choose 1 option, and not all if needed. Any ideas?