Were you using the term "claims control over entry of goods into the territory" instead of "claims their land", there would be much less to argue about.
"claims their land" sounds like Israel would like to annex Gaza and make it part of Israel - which is ridiculous and patently false.
Is it? Certainly, there are political factions within Israel that claim it should be part of Israel -- that's why there were settlements to remove in the first place. It would be ridiculous to deny that, honestly. Those factions seem to continue to grow in influence every year as well.
The idea that Israel should be one state that covers the entirety of the former mandate of Palestine seems to actually be pretty popular in Israel right now. It may not be the official policy, but it is a very real possibility.
Regardless, if a country exerts every measure of control over a territory it can including entry and exit from it along international borders, it's really hard imo to argue that it sees it as sovereign in any way. Israel clearly does not see Gaza as an independent state. So if it's not an independent state what exactly is it a part of if not Israel.
Or, to put it a little bit more snarky: you can't neglect your way out of an occupation. Neglect is, in fact, a weapon in cases like this.
Egypt does control access in and out along their own border, as every country does, but afaik the nature of that control is at least somewhat dictated by agreements between Egypt and Israel.
As far as I know Egypt does not do any of the other things I listed, like controlling what can go in and out of Gaza through borders that aren't their own, nor do they make military incursions into it or bomb it.
Also, and I think this is actually pretty key to the idea that Israel believes the land of Gaza to be part of Israel, if Egypt were to invade Gaza do you really believe that Israel would allow that to stand? If Israel truly considered Gaza a state not under its jurisdiction, Egypt annexing Gaza would likely be a welcome outcome.
Nope. It (or rather the United Arab Republic, of which modern Egypt is a successor but not the sole successor) temporarily occupied it (officially, pending resolution of the Israel/Palestine issue, but terminated early by force) from 1959-1967 without claiming it.
There was some ambiguity about Egypt’s stance between 1967-1978, but after 1978 they unambiguously had no claim, even administrative, over Gaza.
"claims their land" sounds like Israel would like to annex Gaza and make it part of Israel - which is ridiculous and patently false.