Sakura was so strong against the mini fission ten tail creatures that she made EMS Sasuke smile and Naruto was shocked at her new awakened power.
Hashirama compared her monstrous strength to a younger version of Tsunade
She was stated to have been “equal” to Naruto and Sasuke but this is something I want to elaborate on. She was equal only in a sense that she could finally fight alongside Naruto and Sasuke without being a complete liability/hindrance or a damsel of distress. She could finally fight along side them on equal footing but not equal strength
She was also stated to have “surpassed” Tsunade NOT in power but in medical ninjutsu but this is also something I want to discuss because she didn’t surpass Tsunade in medical ninjutsu either as Tsunade was able to heal Shikamaru. Sakura with a 5x chakra amp from the 9 tails still could not heal him. Tsunade is a descendant of the Senju and Uzumaki clan with enormous chakra reserves and much more battle experience, she has survived 3 great ninja wars and has so much chakra she can waste chakra altering her appearance to look young 24/7. So personally I don’t think she has fully surpassed Tsunade
After she awakened hundred healings she was able to survive being impaled by a truth seeking orb.
She also had enough chakra stored in her seal to match a clone of SPSM Naruto.
With the help of team 7 distracting Kaguya she managed to get in kaguya’s blind spot by coincidence (she was unaware of the weakness) and she managed to break her horn with a punch. But 3 god level ninja had to distract Kaguya just so Sakura can even be in Kaguya’s presence
(This is a small feat after the war but it’s worth mentioning) in the novels it’s stated after she awakened the HH she can build chakra faster even in base
During her novel a year or so after the war she fought a man named kido who had made a tailed beast drug inspired by kingaku and ginkaku. He turned into a pseudo jinchuriki who could use a V2 state. She almost died to an artificial bijuu bomb so weak that it couldn’t even physically detonate yet almost killed her. And I only mentioning this because this is a much stronger version of Sakura but she’s still not so much stronger than Kingaku & Ginkaku/ 4 tail Naruto.
She is about sanin level
I say she’s tied with Tsunade or under Tsunade in mid Kage and I’m being generous