Signs in Matthew are covenant proofs, not a catalogue for a later age to restart.
John asks if Jesus is the Coming One. Jesus answers with Isaiah’s list happening in the room.
Matthew 11 and the feeding/healing clusters treat signs as harvest evidence inside that generation.
The sign-generation received enough light to be judged by it. They were not left waiting for a later brochure.
The signs already named the King. New Creation faith does not hunt a replacement set.