Here is Sayounara, to Kimi wa Te o Futta chapter 4
Here is Mangadex reader link:
https://mangadex.org/title/7c31e5b6-6f0e-4ddd-9a11-d338e201ba2d/sayounara-to-kimi-wa-te-o-futta
Here is Batoto link:
https://bato.to/series/116329/sayounara-to-kimi-wa-te-o-futta