Did Prophet PBUH divorce Sawda R.A?

Salam! I have come across a sort of a troubling narration about Prophet PBUH's marriage with Sawda R.A: https://sunnah.com/tirmidhi:3040 At first I was like maybe it was just Sawda R.A being afraid of divorce and Prophet PBUH actually did not actually initiate it but then I came across an article online which quoted a mursal report from some Ibn Sa'd book that the Prophet PBUH actually initiated the divorce and Sawda R.A in order to save her marriage gave her night to Aisha R.A. It has given me some more doubts than when I came across the narration in tirmidhi... This isn't sitting well with me... I'm sure I'm missing some context here. The Prophet PBUH cannot just simply decide to divorce his older wife one day?? Besides arent there other traditions for the revelation of that verse (4:128) too? Can you please take a look and see what the authentic narrative says about this whole situation? JzkAllah Khair!