I'm new to chess and in my first game on lichess.org my opponent spawned a bishop out of thin air.Photos for reference: https://imgur.com/a/3gHWlIs this a cheat? I'm really confused, I thought only pawns can upgrade/spawn to other pieces.
you are playing Crazyhouse variant.. not standard chess for more info, read here lichess.org/variant/crazyhouse
It would help if you were playing a standard game, but you're playing Crazyhouse. :P