Accrescent is a relatively new but actively developed and “private and secure Android app store”. It is available by default on GrapheneOS and lists a number of security and privacy focused apps, inclduing Molly and Cryptomator, providing good alternative for Google Play store or FDroid.
A submission porcess is described in their documentation:
Accrescent developer registration is currently invite-only. Please come back when registration opens for everyone.
Also besides invite link I think we will have to change app ID, currently it does not correspond to our domain. Actually gplay version is using delta.chat domain, not messenger.b44t.com as I thought.
Not sure I like this app store much though, it has some proprietary apps that ask for Google login etc., probably not going to care about app quality and will get filled with garbage when registration is open.