A dynamic menu that is loaded from a mysql database into contact forms 7, wordpress?

Question

WordPress

It is necessary in CF7 to put a dynamic, drop-down menu that consists of a list of regions and cities ->> districts.
There is a plug-in in the Contact Form 7 VI - Conditional Fields, Contact Form 7 Database Addon, they are only manually registered.
I need a person to click on the Kharkiv region, and cities fall out, there are yaks in the region, then districts. After all, you can take it from the database, but how can you do it?
Found this, but it can be done manually
And I need it directly from the database

Answer 1

Look for APIs for online services that offer similar services.
And then just integrate their API with your website