An efficiency proposal: As one ex-blackberry user I have needs for personal notes. Voice recorder is a cool thing too. I hope this simple base apps will be added in the "Apps" as soon as developers can. Thank you.
Notepad and Voice recorder
Have you tried (or at least taken into account) the Markdown editor and its Quicknote feature?
Both can be installed from external sources like F-Droid.
I use Nextcloud Notes (because it keeps it synced with my server).
There's tons of recorders.
fromTom
As I see the Markdown editor is a class of editors to make files with .md extension. Quicknote looks similar. I use Obsidian on my PC with the same md-files. But how can I use it with GrapheneOS? Just install one more app or texting in some cloud? I need save text in some default app to use it offline without any additional installing and access to web.
This kind of apps are base of any user friendly OS. Camera, gallery, pdf-viewer, calculator, clock/alarm clock - are already preinstalled. I'm asking about text editor/notepad and voice recorder. I hope it will be added in future, I hope asap.