Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Yep - your daughter can use your upgraded Microsoft 365 Family plan from Ireland while you are in the US. Microsoft does not enforce geographic restrictions on who you share the subscription with or where they use it, as long as the plan was purchased and activated in your home region (the US).
More at https://learn.microsoft.com/en-us/answers/questions/5192617/365-family-across-countries
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hth
Marcin