Recent FOI released by the Department of Home Affairs shows the number of on-shore vs offshore GSM visa grants.
For the month ended 30/06/2020, the Department of Home Affairs granted 1024 Subclass 189 visas. Note, this data also includes grant of visas to secondary applicants.
By contrast, for the same period there were 32 off-shore subclass 189 grants. The data includes primary and secondary visa grants.
Full details can be found in the link below.