ePublishing Requirements

I’m in the process of converting some of my Magazine templates into ePublishing formats. Can anyone please advise on what the requirements are for ePublishing Digital Magazine Template Submission Requirements. I have seen this link before but it looks like it was first issued when Envato started the ePublishing category: https://help.market.envato.com/hc/en-us/articles/202501204-ePublishing-Digital-Magazine-Template-Submission-Requirements

I’m sure as new products i.e iPads and tablets have been introduced since then that the requirements might be different. Much appreciated for any feedback thanks.

Anybody care to help?