You have to be age 6-7 for the matchmaker to come, depending on what age your tamagotchi evolved into an adult. Set the time to 10:29 AM to see if your tamagotchi is old enough.. wait a minute and see if the matchmaker appears on the main screen.
The matchmaker comes when your Tamagotchi is in the ages of 6 and over. It comes at either of these times 10:29 then wait a minute, 2:59 then wait a minute or 6:59 then wait a minute. So the exact times are 10:30, 3:00 and 7:00.
The matchmaker comes 3 days (3 yrs) after the Adult. She will come randomly around ages 7-8. But the most common times for 6-7 yrs olds are 2:59 P.M., 6:59 PM , and 11:59 A.m., and sometimes 9:59 AM (wait a minute)
The MatchMaker comes to your tamagotchi after it has been an adult for at least 72 hours. She will come at 10:30am, 3pm, and 7pm. If your tamagotchi is at the right age for the MatchMaker to come you can set the time to one minute before any of the times I've given you and wait a minute. The MatchMaker should come.