Why Didn’t Anyone Besides Matthew Mention the Resurrection of Multiple People after the Crucifixion?

Questions about why no one besides Matthew mentioned the resurrection of multiple people after the crucifixion, whether there were rainbows before Noah, and why Jesus told the restored demon-possessed man to tell people about his healing but commanded the formerly deaf man not to tell anyone.

• Why are there no extra-biblical accounts of the resurrection of multiple people described in Matthew 27:52, and why isn’t it mentioned elsewhere in the Bible?
• Do you think the mechanics for the creation of a rainbow did not naturally exist before God put it in the sky for Noah?
• Why do you think Jesus told the restored demon-possessed man in Mark 5 to go tell his people what the Lord had done but commanded the deaf man he healed in Mark 7 not to tell anyone about the healing?