The present perfect progressive in passive voice is extremely rare. BNC has only two examples.

http://bnc.bl.uk/saraWeb.php?qy=has+been+being&mysubmit=Go

COCA has 8 incidents.

http://corpus.byu.edu/coca/ Search for "has been being". The link does not work as I thought.

The present perfect progressive in passive voice is extremely rare. BNC has only two examples.

http://bnc.bl.uk/saraWeb.php?qy=has+been+being&mysubmit=Go

COCA has 8 incidents.

https://www.english-corpora.org/coca/ Search for "has been being". The link does not work as I thought.

The present perfect progressive in passive voice is extremely rare. BNC has only two examples.

http://bnc.bl.uk/saraWeb.php?qy=has+been+being&mysubmit=Go

The present perfect progressive in passive voice is extremely rare. BNC has only two examples.

http://bnc.bl.uk/saraWeb.php?qy=has+been+being&mysubmit=Go

COCA has 8 incidents.

http://corpus.byu.edu/coca/ Search for "has been being". The link does not work as I thought.