I believe there is a child profile to allow them to play with your phone and not download or delete important stuff. I do wish there was a travel profile where you can put mock data and photos on it. Then have parameters whereas if the code is inputed (not bio) multiple times at an airport then it wipes the normal profile in the background and keeps the 'travel' profile.

GrapheneOS team had already said they won't add this as it's significantly less secure than keeping the phone locked or wiping the data