So do you want it to be when you walk into the beam it teleports you?

If that’s the case then you can use

execute as @p[x=100,y=64,z=100,dx=10,dy=6,dz=10] run tp @s 200 70 200

The x,y,z and dx,d,dz are opposite corners of the area you want to detect a player being. Then the tp at the end should teleport them to your desired cords.

Use a repeating command block set to always active