"Youzumi' Seijo to Tsuihou Saremashita ga, Ringoku no Okakae Kusushi to Shite Daini no Jinsei Ouka Shimasu!: Sochira ga Oidashita Kuse ni, Imasara Modotte Koi Nante Okotowari desu!

Spica, a saint born with healing powers, is betrothed to the second prince, Hadal, due to the rarity of her power. Spica devotes herself to her country, but one day, her engagement is annulled. With advances in potion technology, healing powers are no longer necessary—Spica is banished with these words. Now a "useless saint," Spica decides to create potions for her family and to heal those who are hurt...! When Spica tries making a potion, she creates a secret medicine imbued with the saint's magical powers that has XX effects...!?
The potions she enjoyed making are needed by people, and Spica regains her confidence, but her situation changes completely when she saves the prince of a neighboring country!!
"Why not become a court pharmacist...?"
The story of a banished saint's dramatic reversal begins!

https://www.cmoa.jp/title/351720/