There is an error in the tripod camera code, but that's why the behavior pack pairing problem lies. It should be confirmed for the Beta/Preview. I think should appear in the cheat command. We can add in the commands "/give @s spawn_egg 1 62"
I'm telling you it's an error in the json code "is_summonable": false". Mojang Should Change Tripod Camera Pairing Error

It should reappear the tripod camera in the vanilla of Beta/Preview to normal