Here is my 100% Achievement guide & Walkthrough for Chapter 4 :)
Timestamps below the video
1. Pressed Rose (Collectible) - 1:45
2. Count Me In (Collectible) - 4:20
3. Exactly 731 (Missable Cheev) - 5:00
4. In Front Of God And Everybody (Collectible) - 7:10
5. Birthday Boy (Collectible) - 8:30
6. Proud Parent - 16:00
7. Emotional Archelogist - 16:35
8. The Kind Of Thing You Can't Undo - 51:35