Tensai Madougushi wa Souki Retired Mezashite Ganbarimasu

https://www.cmoa.jp/title/323103/ A Genius Magic Toolmaker's Efforts to Achieve FIRE! A former office worker who died from overwork is reincarnated in another world as a genius magic toolmaker! This time, she aims for a slow life and a free lifestyle—and what she needs is passive income! Millis uses her talent and knowledge to develop one product after another. But the world of magic toolmakers is not so easy... With a series of challenges and new encounters awaiting her, will she be able to forge a path to her dream of FIRE?