How to transfer purchased Apple Wallet tickets from Mac to iPhone?

2 question. i just puchased tixs for my son for an event that only delivered the tix via apple wallet. I have the download on the mac but need to get them from my mac to his apple wallet. I will not be at the event with him. I know now I should have purchased tixs on my phone rather than mac but now have this issue. Need to get the tix to him today. Thanks. I am physically not with him.

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