Job locations not editable in frontend?

Hello,
On our website (https://www.a-flex.nl/vacatures/), we are using the Employer frontend of our website to add jobs.
Everything is fine, except the job location:

It can only be picked up in the list already defined in the taxonomy of job locations.
So, for 1 job, we have:
Job address: We can freely enter a full address that shows well on the map
Job location: only from a list, and so, impossible to have the right cities in the search box dropdown "job location".
In the example attached, you can see a job showing in the city of Venlo on the map with the Job Address, but only categorised in the Netherlands for the Job Location, as the city of Venlo is not in the Taxonomy.
How can we enter the Job Location in the Employer frontend?
I guess this is also the field used by job boards when syncing data?
Thank you.