I want to collect points with SBAS corrections in ArcGIS® Field Maps. Is there a specific location profile I should be using?

When you open ArcGIS® Field Maps, there are a couple places the app will look to determine a default location profile. First, if you have not opened a specific map, then your default GNSS coordinate system (the datum in which your locations will be collected) will be GCS WGS 1984 (the coordinate system used for default Esri base maps). If you’ve opened a specific map, however, then ArcGIS Field Maps will default to using the same location profile as what is being used in your map you’ve opened. Now, if you plan to use SBAS corrections during your field work, you do not need to set up any extra location profile. The default will suffice. This is because SBAS corrections use the GCS ITRF 2008 datum; Esri apps currently treats these datums as being identical.

For a full tutorial on how to set your location provider and location profile in ArcGIS Field Maps, visit this article.