Some breeds, and some individuals, are louder than others.
Some of them get especially loud around the time they start laying (or laying again in the spring), and quiet down at least partway as time goes on. Some others seem not to quiet down at all.
Rehoming the noisiest few might be the only effective option if they continue to be noisy at a level you consider a problem. (Butchering the noisy ones would work equally well, although I'm guessing that you would not want to try that.)
Any strategy that blocks noise has a chance of helping: locating the chicken pen so trees or bushes are nearby, growing vines up a trellis near the chicken pen, and so forth. Some people with roosters get quite elaborate about blocking noise in such ways, so reading threads about blocking rooster crowing might give some ideas here.
Giving them treats will make them quiet while they eat the treats-- but this may encourage them to make even more noise in future, hoping for more treats, so I would not recommend it!
If it is specifically the "egg song" that you are noticing:
Picking up the noisy one will often cause her to be quiet while she is being held. She may or may not start up again when you put her down. Most chickens dislike being picked up and held, so this will probably not encourage them to squawk extra in future (unless you have an unusual chicken that does like it.)
Taking the noisy one into the house until she has forgotten about singing the egg song would probably work too, at least until next time.
Sometimes just the presence of a human nearby will temporarily stop them, but not always. Any other kind of distraction also has a chance of temporarily making them stop. Again, you don't want to encourage more squawking in future, but you could try things like mowing the lawn or taking out the trash, that would attract their attention without giving them any reward.
(If it is just chickens talking loudly about everything that happens, those last few ideas will not do much good. But the "egg song" will often stop if something distracts the chickens, and a long enough distraction might let them forget to start again.)
I’m hoping once our other girl starts laying she won’t feel the need to squawk? I genuinely don’t know why she’s squawking but im lucky that at the moment I’m home every day and wait for the squawking in order to quiet her down! One complaint from neighbors and we’d have to get rid of them and we just started getting eggs from our one girl. (She is a mighty layer though, one egg a day with one skip day a week)
