Many users upon making a new rig to try out vocal effects will start adding effects to the rig and notice that as they do that every category even beyond vocal effects are available to them. Beyond that, they'll also notice that the vocal category of effects are available on guitar signal paths.
For those curious about this, this is fine to do. Lots add impulse responses, make amp clones of your favorite amps, apply stereo reverbs and more to make them sound more natural. Likewise it is completely okay to add vocal effects to your guitar signal, including the vocal doubler for solos and more.
Please note to keep an eye on gain staging when running a vocal signal through guitar effects. Many have gain that they add to the signal, which can potentially make them louder than intended, even if they do not necessarily add any distortion. The way to check this would be the OUT block of your signal chain, and if you notice that it begins to touch the 0 marking, it may be good to turn down the mic level knob on the back of the unit.