Network admin Bulk Smush issues

I have Multisite where I have setup Smush Pro at Network level (Subsite control = None) so it can only be accessed via Network admin.

When I visit Network Admin > Smush Pro > Bulk Smush (There is a green tick)

It doesn’t scan for existing Media Images available in the subsite’s media library.

Status of the images are set to “Not processed”

Do we need to manually Smush the existing Images which are available in the Subsites?