Will Envato offer purchase codes for WP plugins in Elements? Manually updating several websites is not okay. Also clients don’t have access and this is not “future proof” like the website says.
As you don’t actually purchase a license, you naturally won’t be able to get a license code.
Envato Elements is a subscription based service, and as such, there will always be limitations when comparing to an actual purchase, such as no support, no automatic updates, etc. … all things provided by the author, and not Envato.