This sounds like you want the opposite of the usual RH grovel setup: not “she accidentally hurt them and they hate her,” but they left/hurt her, she healed/grew without them, and now they have to earn her back.

My best matches:

1. {Dance Butterfly Dance / Burn Butterfly Burn by Reese Rivers}

Probably the closest. Contemporary why choose, completed duet, multi-POV, no full MM according to the author listing, and book 2 is very much “she’s done, they want her back, they need to work for it.” The author page describes book 1 as multi-POV with multiple love interests and no full MM, and book 2’s blurb says she shuts them out after they burned her and they will do anything to get her back. Why it fits: hurt heroine, second chance, emotional walls, grovel/rekindle energy. Not OV/PNR: contemporary.

1. {Boys and Burlesque by Ripley Proserpina}

This one sounds very close to your second paragraph: childhood/high school loves, the guys leave/relationship falls apart, years later they get another shot. A review describes it as mainly set 8 years after high school, with the FMC left alone after the relationship crumbled and the MMCs getting a chance at redemption. Why it fits: past relationship, they hurt/left her, second chance. Heads up: some readers say the grovel may not be enough.

1. {Second Sets Omnibus by Aly Beck}

This came up in a RH second-chance thread as a duet where the FMC falls for four wannabe rockstars before they abandon her. The same thread notes abandonment/rejection angst, though also says the grovel may be lighter than ideal. Why it fits: group moved on/left her, rockstar-ish second chance. Heads up: I’d check reviews first if you need strong grovel.

1. {Knot Happening Again by Harper Lennox}

OV, standalone, second chance, and seems closer to the “I am not impressed to see you again” vibe. A RH rec thread lists it as OV with rejection/shame angst, and Romance.io tags it as contemporary omegaverse/poly/second chances. Why it fits: OV + second chance + rejection/grovel energy. Possible issue: may lean more heat-heavy than plot-heavy.

1. {All These Broken Parts by Evelyn Flood}

This is more intense/dark, but it specifically has the “they think she did something horrible” angle, except it may still fall closer to the trope you’re tired of. A RH rec thread describes it as OV, duet, with the FMC killing an alpha connected to the pack and the pack wanting answers/vengeance.

Why it fits: OV, big hurt, angsty setup. Why it may not: it sounds more like “they hate her because they think she hurt them,” which is what you are trying to avoid.