Both shows feature young women at the crossroads of their lives who meet older mentors and get introduced to a new lifestyle (architecture for Meikenchiku de Chushoku wo and lamps for Haruka no Hikari)
Haruka no Hikari (2021)
Similars
Both female leads are fans of unusual objects (lamps/trains) and humanise them by calling them "children". If you liked the passionate FL of either of these shows, you'll surely enjoy the other
While both of these dramas have different plots and vibes (additionaly Isu is an anthology with a different main character each episode), both focus on furniture (chairs for Isu and lamps for Haruka no Hikari) and weave tales around them. If you're passionate about furniture design and enjoyed either of these shows, you should check out the other one