I don't know if that will happen. A lot of the cloud heavy offices moved to shared desks for engineers, so there's only a desk for 2 days/week, so they don't have enough space available for everyone to return full time.
It's still possible, but I don't think would be as easy as an annoucement.
My experience (at least in the US and UK) is the opposite. A pumpkin is a very particular (usually round and orange) type of squash. Squash is the generic term for most of the vegetables (both winter and summer variety) that are eaten.
I've really only seen "Pumpkin" used more commonly in Australia, where I was surprised to see someone refer to what I knew as a butternut squash as a pumpkin.
It's still possible, but I don't think would be as easy as an annoucement.