Irrelevant.
That as nothing to due with the fact that they say they are. Zoom is being completely dishonest, and as some other commented here, some orgs like in health care area, have E2E encryption as requirement, Zoom says they have, but don't. It's literally fraud.
1. HIPAA et al have very specific meaning that do not have anything to do with end-to-end encryption at all. If you know this, read this line, and care about HIPAA you know exactly this.
2. end-to-end has several meanings, for users it means what Signal does, for machines it means TLS is securing edges.
Irrelevant. That as nothing to due with the fact that they say they are. Zoom is being completely dishonest, and as some other commented here, some orgs like in health care area, have E2E encryption as requirement, Zoom says they have, but don't. It's literally fraud.