Yes you can cook noodles in a crock pot.
Cooking noodles in a crock pot can be done but it's a little more tricky to get the noodles cooked properly in the crock pot than it would be on the stove.
Cooking noodles in the crock pot can cause the noodles to become soggy and mushy if you allow them to overcook.
Pasta or other noodles really are best cooked on the stove in a pan by boiling water because the slow cooker will slowly cook the noodles and they will turn out soggy if left in the slow cooker longer than 30 minutes.
It takes around 10 to 15 minutes to cook noodles on the stove and sometimes less time depending on how many noodles you're cooking.
I would recommend just cooking the noodles in a pot on the stove because it will make the noodles better and take less time.