This post is based on Adbhut ramayana (which is also attributed to Valmiki and shows the how the ramayana went in different kalpa) and some folk tales.

1. Sita:- Bhadrakali, Slayer of Shaastra ravana. (image 2)

After Rāma kills Rāvana of Lańkā, Sītā reveals that this Rāvaņa was only one among a thousand brothers, the younger Rāvaņa. His elder brother, Sahasra-Rāvana, rules from Pātāla (netherworld) and possesses ten thousand heads and immense power. When Sahasra-Rāvana learns of his brother's death, he comes to battle Rāma. Even Rāma's arrows and weapons are powerless against him being overpowered by the demon, Ram goes unconscious.

Seeing her husband unconscious in battle, Sītā laughs with terrible cosmic energy, and from her body bursts forth a form of Bhadrakali

Then, from the body of Jānakī, that resplendent Goddess, issued forth a form black as collyrium, with a thousand arms, terrible to behold, holding every weapon, dancing amidst the battlefield.

In an instant, she devoured the hosts of demons; Her laughter shook the worlds; The earth trembled under her feet; The oceans boiled; the gods trembled in the heavens.

After the destruction, she drinks the blood of the slain, dances on the corpses, and performs her Rudra Tandava. Then, on Rama's prayer, she calms down and reabsorbs herself into Sītā's body.

2) Sita:- Agni pariksha, Sakshat Bhuvneshwari (image 1)

During Agni pariksha, Instead of simply emerging unscathed, Sītā reveals herself as Bhuvaneśvarī, the Supreme Goddess, source of all existence. Agni Deva himself emerges, bows to her, and worships her with hymns.

Thou art the Mother of the Universe, O Bhuvaneśvarī, The eternal Parabrahman, In thee are born the gods, the worlds, and the Vedas.

As she stands in the fire, her divine form is radiant, adorned with celestial ornaments, surrounded by flames that turn into lotuses. The devas, rsis, and elements themselves recognize her as the eternal ParaShakti.

3) The presence of entire creation in Sita and the revival of the dead soldiers.

after killing Shastra Ravana, Sita reassures Ram of his divine status, Maa Sita shows the entire creation within herself to shree Ram, one of the visual being Both of them being at their eternal abode, together. after that only a compassionate glance of Sita Bhuvneshwari revives all the soldiers that died in the war.

4) Sita did what Lakshman and Hanuman couldn't (Folk)

After the war, the four went to the yatra of Mata Hinglaj bhawani, which is a long but wonderful story, I will share that too if you all will want but in the middle of yatra Mata Sita was thirsty and asked Lakshman and Hanuman to fetch her some water, being in middle desert it felt impossible, but Hanuman slammed his foot on the dharti hoping to form a well, lakshman tried to fetch water from mountains with his arrows but both failed, in the end Sita just merely touched her four fingers and thumb on the ground and immediately 5 rivers and well were formed which are still present at hinglaj shakti peetha with the name "Sita ke kuwae". Later in mithila when shree ram was thirsty, she performed the miracle again.

There are many many more miracles of Maa Sita, from her miraculous feats as a child to her cosmic revelations in Lanka, Sītā is more than a devoted wife or ideal woman(not saying there is anything wrong or less divine being just that) she is the living embodiment of ParaBhraman. In every story, she reminds us that the divine is both gentle and fierce, protective and transformative. To honor her is to honor the power that sustains the universe.

Sītāyai Mahā-śaktaye Namah

Sri Matre Namah

Maa Sita is way more than what people think, have a read to know more about her miracles.