It’s a bit hard to see wood for trees here.
Is what I have quoted the main question?
Those effects are to be used on selected stereo tracks, but you could use the Track Drop-Down Menu on the upper track of two mono tracks above each other to make those into a stereo pair. See Audacity Manual .
Then if you wanted to you could redistribute the channel volume proportions using Channel Mixer. Open the plug-in on a stereo track to see what it does. It doesn’t do EQ or isolation. It can mix content from one side into the other, but it can only adjust the mix proportion of all the content from each side.
Use the Track Drop-Down Menu to split back to mono if wanted.
Please start a new specific topic about that, giving Steve the information he requested .
If these are already stereo tracks, use the same Track Drop-Down Menu to Split Stereo Track. Then select the left or right on its own.
If you have split the stereo track, drag the selection in both channels then the effect will apply to both channels.
Is this about putting the snare more into one channel than it already is? Yes if you can isolate it without destroying it, you can pan it as a reinforcing additional track wherever you want in the mix. It may be hard to isolate it.
Gale