How frequently are GFM data updated?
From MyDewetra World
GFM products rely on Sentinel-1 data, therefore their availability is mostly dependent on the latter.
One of the GFM products is the S-1's schedule by means of which users can retrieve the information on the next data update.
Specifically, update and authoritative information on the revisit time are available on S-1 webpage, the figure below os courtesy of ESA:
For any further information please contact the User Support.