What are the service menu codes you type in the dialer
L8437 you'll need to be clearer what you mean by service codes. What are you trying to achieve by using them?
What specifically are you asking. What service codes are or which different service codes exist for GrapheneOS?
For the latter I believe they are the same as for AOSP and stock pixel android so just google that.
trilogy6202 I've tried googling them but they don't seem to work. Someone posted it on here I just can't find it
Okay. I haven't used them myself so I don't know for sure but maybe you need to enable "I am a developer".
trilogy6202 In general, enabling developer options is not a good idea on a production device.
This was it
L8437 If you are looking for information about the phone, battery, and various network statistics you need to use *#*#4636#*#*
I just tested at it works on my 7 without being in developer mode.