It should be, everywhere.

Do you have trouble? Can you send an example of the request URL, which is not working?

Note that ESA does not have a homogeneous observation scenario for Sentinel-1 (as they have for Sentinel-2).

In South America there are for example only descending orbits:

Find more info here:

Sentinel-1- Observation Scenario - Planned Acquisitions - ESA - Sentinel Online

Sentinel-1 observation scenario implements a baseline pre-defined mission observation scenario, making optimum use of the SAR duty cycle within the technical constraints of the overall system.

Hi,
the problem was in geometry polygon coordinates in our fis api call.

Note: the geometry polygon coordinates must be Longitude Latitude.

Example call: https://services.sentinel-hub.com/ogc/fis/-ID-?GEOMETRY=POLYGON((Longitude Latitude, Longitude Latitude, Longitude Latitude…))&CRS=EPSG:3857&-other-parameters-…

Best