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Hi, welcome. I moved this to the Incubation and Hatching page for more views.
How have your temperatures been? If they are low, they could be late. If they got too hot, like 103, they may be dead. Use a HIGH power light or flashlight to look to see if there is a dark spot BUT, since you are on day 22, keep the bator closed for two more days.
Eggs DO NOT get heavier when you incubate them. They are a closed system and GET LIGHTER due to evaporation. If you can see a big blob... they are probably not going to make it as they should fill up the egg by now. Try not to open the bator too many times, during incubation as that will change temps and humidity and can compromise the hatch.
Are you sure the eggs were fertile? At this point, I say leave them be and on day 25 take them all out and crack them open into a dish to see how far in development they got or if they developed at all.
The key to good hatches is to be able to keep temps at a constant 99.5 for a incubator with a fan, and 101.5 for incubators with no fan. Humidity at about 50 for the first 18 days, and 70 for the last three. In addition, turning eggs 3x a day for the first 18, and candling as FEW times as possible so you don't disrupt temps and humidity.
Good luck and I hope at least someone makes it.