Well, I don't think it can hurt anything if its inside the column, but you might be able to get it to fall out the bottom.
First look in there with a penlight if you can, to see if you can see it and maybe snag it with a bent wire.
If not, try jarring the column casing with your hand and wiggling the turn-signal wires.
If you dropped it outside, grab a magnet. That high carbon spring steel will jump at a good rare earth magnet.
I get calls all the time to find things, and have a remarkable track record. Everyone always asks me afterward what my secret is.
Its really quite simple, I look for the missing part. I have a few tricks, but mostly I just look.
Unless its dropped in the deep ocean, or something, it still exists, and all you have to do is go to where it is and pick it up.
Many many times, a part will fly into some tall grass or bushes, and everybody just goes " Well, that is lost. We could never find it in there".
I walk over, poke around a few minutes, and find it. And everybody is amazed. Because they never even looked.
Don't assume its gone forever. Also if you have pant cuffs, check there, and all your pockets.
Another one of my secrets.