This guide will tell you how to Switch Characters in Destiny 2.
Now if you are in the game and want to switch the character, then you have to log in to one of your characters. At the bottom right of the screen, you will find a Menu button, click on it a new screen will open where you can see your clang collection and your characters.
After this, press the r1 button, go to settings, and then navigate down to gameplay. There, you will see an option to change your character, you have to select it.
It will take you to the character selection screen and also you don’t need to close down the application and reboot it. Now you can select your character and login into the game.