Django algolia search: How to create search for multiple models

In Django I have 4 different models

class Baby(model.Model):
    name = ... #(babys name)
    description = ...
    .... other fields not common

class BabyStore(model.Model):
    name = ...  #(name of the shop)
    description = ...
    .... other fields not common

class BabySitter(model.Model):
    name = ... #(babysitter name)
    description = ....
    .... other fields not common

class BabyDoctor(model.Model):
    name = ... #(babydoctors name)
    description = ...
    .... other fields not common

As per https://github.com/algolia/algoliasearch-django we have to register each model

import algoliasearch_django as algoliasearch

from .models import YourModel

algoliasearch.register(YourModel)

This will create seperate index for each model.

In my case i want to have a search UI for all of them together and use the model as the facet.

eg:

So how to use multiple indexes and create a single search

I know within each index, we can have facets. But here Along with that i want to use each index as a facet itself