There might technically be square footage in the back, but if it's supposed to be "quarantined" and kept away from TMs, that doesn't really work, as there is no space in the backroom that doesn't have TMs in the same space. With the FRs still closed it's likely safer to bury the returns in the middle/back of the racks than to put it in the back where people are moving in and amongst the "quarantined" merch.
Now, I don't think the clothing is a significant transmission vector, so I'm mostly being a PITA here, but pointing out that the idea of "quarantining" softlines items is particularly fucking stupid given the average store layout.
If this was actually a practical move and not a PR one, that is, but since it's not, whatever.