The young person greeting the older person

Second: Who is required to greet?The Sunnah clarified this: The young person greets the older person; because the right of the older person over the young person is greater than the right of the young person over the older person, the young person begins by greeting the older person. But if it happens that he did not greet, does the older person leave off the greeting because the right is his, or does he greet so that the Sunnah is not missed?
And
He greets, so that the Sunnah is not missed,So for a person to say: I am the one with the right, why did he not greet me? This is a mistake. It is true that you are the one with the right, and that it is prescribed for him to greet you, but if he does not do so, you greet him.