nahakubuilder Until I got 6a I did not know what E-Sim means... If I add the E-sim before I flash Graphene OS, will the e-sim be working? Or Can I add the E-sim in graphene OS without problems? I saw it in FAQ so I believe it should work.
Yes, the eSIM will be there if you install it before you install GrapheneOS.
nahakubuilder For some reason Wi-fi calls are not working on UK Lebara on 6a, but it worked on P30 Pro... is there some option to make this work on Graphene OS?
If it doesn't work on Stock OS, it's unlikely to work on GrapheneOS. You might need to contact your carrier to figure out why they don't support it on your 6a.
nahakubuilder What I hate most so far on 6a, is that I do not have option to schedule shutdown and start of the phone. Untill now I was used to shut it for night on all my phones, but here is no option. Does Graphene os provides this function?
Not that I'm aware, at least as part of the OS. It might be possible with some third party app, but I'm not sure.
nahakubuilder Is there some app lock on Graphene OS, what allows me to lock any app with pin or fingerprint?
The app would have to implement this. GrapheneOS doesn't currently have an app lock like that that can be applied to any arbitrary app.