You probably could if you really tried to find a drawn out means of doing it, but because switching between first and third person is such a base level mechanic (unless you wanted it to do very little in third person), you’re best off doing it all in one mode or the other. There’s nothing in the Shooter game that can’t be done using Blueprints. You could even carry all of the of the assets over from the Shooter game and put them into a First Person Blueprint project, then build it up from there if its the content you’re after.