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Like deerman said, please continue to ask questions.
Displaying is actually only part of how peahens choose males. They do like males with more eyes in the tail, but they also pay attention to other things such as how often the male yells(read that in one study, peahens were more attracted to males who yelled more frequently), probably other cues too.
It's normal for only very few males get to breed at all out of an entire feral population- many males, females had free choice & able to visit many different males etc. Often one or two males would be doing well over half of the total breeding in the entire season, with 2 or 3 others getting to breed a couple times with the rest either not getting to breed at all, or maybe once or twice. Don't think it's yet fully understood all the 'reasons' why peahens choose a male(s).
Males either come to a common area and display within sight of each other, and/or a male will have his own area well away and out of sight of other males.
With limited mates, they will breed with each other. Displaying is just such a strong instinct in males, so they do it irregardless if they have a full tail or chopped off tail etc. Same for peahens, they will make their own choices if possible.. but if not given a choice, most peahens will 'make do' with the available male, also because their instinct to breed is very strong.
Fanning the tail is a pretty strong part in the mating process, what the males do is put on a show, both visual and auditory.. and if he thinks he has a chance with a nearby peahen, he lets out a special "wanna mate?" call and 'rushes' at the peahen.. if she accepts, she crouches down for breeding. If not, she just gets out of the way.... and that's the end of it. Some males will stop quickly but some males are pretty persistent and will 'rush' at the peahen in bit of circle.