Afaik gaza doesn't have any israel settlement anymore https://en.wikipedia.org/wiki/Israeli_disengagement_from_Gaz... so I am not sure how you could say israeli were expanding in Gaza..
Only weeks following oct 7. Netanyahu announced new settlements in the Gaza envelope, meaning the part of Israel within rocket range from Gaza. There have been documented cases of Israel expending the buffer zone on the Palestinian side of the boarder wall. I would certainly call that expansion, even though the settlements them selves are within Israel’s territory, their security infrastructure results in land being taken away from Palestine.