How to make the player face a certain direction with /setworldspawn

Solution 1:

Yes, in fact, the Minecraft Wiki says that /setworldspawn has an option for facing direction as a yaw angle parameter.

It also states which numbers correspond to which directions: −180 for north, −90 for east, 0 for south, and 90 for west.

So to change the world spawn facing angle to west, just specify 90 in the /setworldspawn command.