Question: I heard on the program ‘Nūr ‘alā ad-Darb’ in reply to a question that it is obligatory that the feeding (expiation for not fasting) is NOT to restricted to one poor person, but rather for every day missed, a different poor person is to be fed.

Answer: Concerning this matter I am not aware of it being obligatory to feed a multiple of poor persons when making the expiation for missed fasts. Allāh, the Majestic, the Most-High, says:

“As for those who can fast with difficulty, they have (a choice either to fast or)
to feed a Miskīn (needy person) (for every day).”
[Al-Baqarah:184]

And so long as the person concerned carries out the expiation of feeding and was to do so with one poor person, I hope and see that as being sufficient, if Allāh wills.

Majmū’ Fatāwā of Shaykh Ṣāliḥ Al-Fawzān, volume 2, page 423.