calpurtmun No need to do all that. And do not enable USB debugging, as it's very dangerous. No need to use ADB or "debloaters". GrapheneOS team already prepared everything for you to use conveniently and nicely:
- Enable Developer options in Owner profile, but don't even open it.
- Open the profile you want to have Terminal app in.
- Unlock Private Space for that profile if you want it there, too.
- Go to Phone Settings -> System -> Linux development Environment and enable it for the profile you're currently in or/and for private space in that profile.
- Repeat step 4 for all profiles you want Terminal app in.
- When finished, open Owner profile once again and disable Developer options. Your Terminal app(s) will stay.