Surface finish issue only on the top layers

1. Problem description:
I’m experiencing a surface finish issue only on the top layers of the print.
The upper part (top area) shows ripples, uneven closure, and poor finish quality.

2. Printer used:
Bambu Lab P1S with AMS

3. Slicer settings:
Standard 0.20 mm profile in Bambu Studio (default settings)

4. Filament type:
PLA

5. Additional notes:
The issue mainly appears on rounded, closed shapes (like domes).
I’d like to improve the top surface quality without drastically increasing print time.

6. Photos attached: :white_check_mark:
(include the photos you’ve shown)

7. .3mf file: (optional)
I can share the file if needed.