Reveal Symbol of CommandAgain, the challenge is not very complicated since you have several possibilities to achieve your goals. At least five points are available, knowing that only one is enough for the quest to be completed.
One symbol can be seen at Believer Beach, another at Corny Crops, one at Weeping Woods, another at Misty Meadows, and the last at Retail Row. Visit any one and reveal it by interacting with the indicated key to validate it. These are translucent and easily visible.
You can find on our map below all the locations, with the maximum precision, of all the symbols.
Once done, you can move on to the last challenge and thus complete Ariana Grande's fill-in card.