I began noticing that I'm getting more brake dust on my passenger side front wheel. Could it be a seized caliper? What should I do?

 

You can try refreshing your calipers.

This is the rear but it still gives you a good idea of what's involved.
https://www.s2ki.com/s2000/topic/921...liper-refresh/

 

2 indicators of calipers seizing are: vehicle pulls to a side under braking and jacking the front wheels off the ground and spinning the wheels to see how freely they move. in extreme cases, your wheels will be hot after short drives around the hub.

 

what kind of brake pads are you using ??