My condolences and may she rest in peace. I don't know many, but Hello! Veterinarian is about a vet who goes through loss in order to help other animals at his hospital. Spinach Bouquet is about a country boy meeting a city boy, the country boy having a secret that the city boy does not want to know. They're not extremely sad, but I hope it can help you out.
I also recommend reading The Wind Spell and the author's second work if you enjoy wlw media. The artstyle is breathtaking, and the story is very interesting. Something that is more on the sad side is No Home. A group of high schoolers who each have different traumas regarding their family. I cried a lot reading it, but it's super good and really changed me.
i'm sorry for your loss. this one's a really good one
https://www.mangago.me/read-manga/on_the_way_to_meet_mom/
Today is my moms death anniversary can someone give me a rec where it’s sad but happy?