Which is exactly what the Ringer article that is the source of the Covington rumor says.
The Sixers have expressed interest in a long list of wings, including Malik Beasley (Nuggets), Glenn Robinson III (Warriors), Davis Bertans (Wizards), E’Twaun Moore (Pelicans), and Andre Iguodala (Grizzlies), according to multiple league sources. Most interestingly, sources say the Sixers inquired about Robert Covington, whom they dealt to the Timberwolves in 2018 in the Butler trade. I reported last month that Covington is available, and that is still the case. But Minnesota could have so many bidders for Covington that the price will be too high for Philadelphia to make a reunion a reality.
I would think the Joel injury changes the trade scenario somewhat. Had things continued to go in the wrong direction it was not impossible they could trade someone from the starting five (not Ben, though that rumor existed already too). The article above suggests they move either Harris or Horford (plus) for Chris Paul (if they could) and mentions trading Richardson too. But I would think it'd be very hard to let go of Horford now, plus you still want him against the Bucks and Celtics in the playoffs