I'm presuming it's down to the laws in the country where the SIM is from (NOT where you're using it, which may or may not be the same place).

For example, Australia has fairly strict rules around verification when activating a SIM card (rules that likely even Airalo's eKYC wouldn't meet). However their eSIMs for Australia appear to be roaming SIM from another country, so they can avoid this requirement..

That said, the Israel one doesn't seem to make much sense. Their currently eSIM is from Annatel, which is an Israel based provider (non-roaming), and Israel doesn't require verification of ID before using a prepaid SIM, so there should be no need from eKYC from what I can see...