https://www.mangago.me/read-manga/kanata_kara/
https://www.mangago.me/read-manga/high_school_debut/
https://www.mangago.me/read-manga/taiyou_no_ie/
The rest of my list- all shoujo all completed https://www.mangago.me/home/mangalist/615384/
you're welcome. also try this one too
https://www.mangago.me/read-manga/kimi_wa_ai/

Can someone recommend me a healthy shoujo manga that is completed