I installed Molly Messager app on GrapheneOS as follows, GrapheneOS app store, Accrescent app store, Molly Messager but Molly installed as a "System App".
Should Molly have installed as a system app? No other third party messaging apps i.e Signal, WhatsApp installed as a system app so my concern is related to a third party app installing as a system app that would in turn have escalated system privileges.

Molly doesn't show up with the rest of my 3rd party apps installed in,
Security & Privacy Settings,
Privacy Control,
Permission Manager.

I have to tap top right hand corner 3 dots, Show System for Molly App to appear.
Molly App "Only" appears as a system app for
Contacts & Accounts
Location
Microphone
Nearby Devices
Network
Phone
Photos & Videos
Sensors

Molly App installed directly from Accrescent but yet Accrescent App Store is installed as a 3rd Party App Only under Permissions Manager. Signal, WhatsApp "All" appear as normal third party apps under Permission Manager.

Molly is also "Greyed Out" like system apps when checking Battery Usage per app in the Battery Section. Signal, WhatsApp are not greyed out. You can tap these app battery usage and directly open these apps but Molly you can't do anything. Its like the system apps which are all greyed out.

I checked and verified the SHA-256 both using App Verifier from Accrescent App Store and Github Mollyim repository.

SHA-256: 6aa80fdf4a8cc13737cfb434fc0cde486f09cf8fcda21a67bea5ee1ca2700886
https://github.com/mollyim/mollyim-android

Is Molly supposed to install as a system app which would escalate its privileges or as a normal third party app like Accrescent, Signal, WhatsApp?
Should I be concerned security wise that Molly is installed as a system app?
If Molly is "NOT" supposed to install as a system app then how did this happen?

I sent Molly a debug log. If you require the system log directly from my Pixel 9 with GOS I can forward on.

Kind regards