Is there a place to see the fast pass wait line time?
No, usually it is a few minutes but if an attraction is having troubles (like animals sitting on the safari road) it can take a long time.
I have waited 15 min or so for a main attraction during CL 9/10 days. It’s either walk on or 5ish min wait on a CL 5/6 day. The wait is so small comparable to the stand by line though.
I have to add: sometimes you will walk up to an attraction and see a long FP line- don’t worry it goes much quicker than the stand by line!