Hi there, LesserEvilPub!
I’ll be more than happy to assist you with these questions. As for your first one regarding updating your products through Stage, you will still need to push them from Dev to Stage as our team will need to review any updates made.
Secondly, you would be correct that this would be your product’s home page in the Epic Games Store and it must adhere to our content guidelines where it’s stated:
“While products on the Epic Games Store may be designed and rated for mature audiences, all main storefront content must be suitable for general audiences (that would merit a rating of PEGI 12 or ESRB Everyone 10+, or lower).”
We hope this helps and let us know if you have any additional questions!