I clearly read it as enhanced compared to the previous versions, which used to be AES-ECB until earlier this year. Note how it mentions "How is this different

I clearly read it as enhanced compared to the previous versions, which used to be AES-ECB until earlier this year. Note how it mentions "How is this different from Zoom’s enhanced GCM encryption?", which means enhanced also applies to the normal Zoom meetings which are encrypted but not E2E, and supports this interpretation.