Never heard of such a thing until now. I’d assume there was some reason why the manufacturer of them got delayed, they do show on back order. 

I suppose Sonos could instead ship you a faulty device, rather than waiting for something they deem, or physically have, which is shippable?

Faulty device?  Its literally a carrying bag they have been selling since the original Move 1 came out in 2019 that for some reason they think commands a $79 price tag.    

Well, a seven month delay does seem out of order, I wonder if they figured out an issue that required retooling. Not much the community can do for you, though.