Thanks, I really liked your take on the laser concept!
Yup, I used Unity's URP (tho it works on the standard or any RP as well)
All you need is a material with an emission parameter and a bloom post-processing effect
If you want something like the red laser, you just set the emission to red and crank the intensity to something like 5~10
If you activate the HDR boolean on your camera, the material will look white, but the bloom will have the correct color 😁