I just finished changing the rotors and brake pads (DIY). However, I've noticed that the steering wheel points slightly to the right by 2-3 degrees. It's a mild issue, but it becomes quite annoying while driving. I'm wondering if I made a mistake during the brake job or if an alignment needs to be done after completing a brake job.

 

I would uh check your lug bolts make sure everything is attached properly and that you didn't switch tires L/R if you've established a particular wear pattern in one of them

i doubt you separated any ball joints or cranked on the tie rod adjusters