Can you transfer data from one plan (mobile #1) to a second plan (mobile #2) held under the same acc

I just added a second mobile number for my spouse, so now have two plans/numbers under my account. Can data be moved, transferred, or gifted between multiple plans/numbers held under the same account? If so, how?
Everything I read about gifting data indicates that gifting occurs between separate accounts, and I am concerned that we won't be able to share our data if needed.


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