1- Add a dropdown to the editor to display the countries, --in the "choices style select "dynamic choices",
--in the "type of choices" select "States body data states edges",
--in the "Choices source" select "GeographQL states's body states edges",
--in the "Option caption" select "current option's node name".

2- Add a dropdown to the editor to display the states,
--in the "choices style select "dynamic choices",
--in the "type of choices" select "Countries data countries edges",
--in the "Choices source" select "GeographQL Countries's countries edges",
--in the "Option caption" select "current option's node name".

3- In the database you need a field of type "Countries data countries edge (GeographQL)" to store the value of the countries dropdown, and a field of type "States body data states edge (GeographQL)" to store the value of the states dropdown.
or you can make the type of these fieldes text and store the "node name".

Editor: https://bubble.io/page?https://bubble.io/page?type=page&name=countries&id=salem409plugins&tab=tabs-1

Mention me in the forum if you have a question @salemmo409