I’ve seen dramas with the premise that the FL has her life ruined and dies, but unexpectedly she wakes up a couple years in the past with her memories intact and starts a revenge quest on her evil husband and gets together with the real ML.

I want to ask if there are any similar dramas where instead of finding he different real love, the FL actually fixes her relationship with her original husband, and he is the ML?

Usually both leads reborn if it's the situation you expect, so that all the misunderstandings get cleared and the original couple can have happy ending, like:

Go Back Couple

The Princess Royal

A few mini dramas come to mind...

Tower of Whispers

Deliberations of Love

As for full length series, the only one I can think of besides The Princess Royal is Si Jin

Thanks for all the recommendations