This would not normally be converted into a passive construction.

The best we could do without further information would be a quite strange but grammatical:

Cleaning has been being done by them.

What we can really determine is that whoever chose this for an item on a paper doesn't know English very well.

This would need "do support" or for an object to be added in order to be converted into a passive construction.

The best we could do without further information would be something that may look quite strange to many eyes, but such utterances are grammatical and natural in certain situations:

[The] cleaning has been being done by them.

More frequently, probably, with a dummy object:

It has been being cleaned by them.

What we can really determine is that whoever chose this for an item on a paper doesn't know English very well.

Related (has been being:)

https://english.stackexchange.com/questions/35784

https://forum.wordreference.com/threads/has-been-being-passive-present-perfect-continuous-use.1689278/