Reality Designation[]
The social media manager for Aconyte once referred to their novels as "Aconyte-618," and while I know that a Reddit comment isn't the most water-tight source ever, I think it's worth considering listing these novels as being set on Earth-618 based on that since it is technically an official source
Marsheila Rockwell and Amanda Bridgeman also referred to it as "Earth-618" in two separate interviews
https://paulsemel.com/exclusive-interview-sound-of-light-author-amanda-bridgeman/ https://paulsemel.com/exclusive-interview-marvel-zombies-the-hunger-author-marsheila-rockwell/