I have a group where members were added from a database, but it turned out that about 40 of them should not be there. I can create list of the ones to be removed, but currently I dont know how to delete them even manually one-by one, neither wp-admin nor my buddyboss frontend seems to allow to even search them. Just going through 50-70 pages would be not realistic.
Maybe some way to remove all and re-add new clean list would be workaround, if there is no “bulk deletion” method.