Expedition 33 was made thanks to a small internal team and a BIG team of outsourced devs. Most big games, and many small games, are made this way!
If you don’t know a ton about outsourcing in game dev, People Make Games has done a phenomenal job covering it

https://youtu.be/bm7KUE1Kwts?si=WuwTDIbdWz1HJk7E