Usage scope of graphical editor like VSCodium

Hi eveyrone,
I have been practising since sometime but I recently found out that there are really strict restrictions with the resources you can access during the exam like only a single tab can be opened on firefox. Can I use the VSCodium to edit files and copy paste them in the terminal when needed ?

No you cannot. You can only use the editors which are installed in the exam terminals - vi or nano