Reproduction steps:
1. Open the attached “BugRepro” project
2. In the project window, select “Assets/_Fonts/FallbackFonts/NotoSans-Regular SDF“ Font Asset
3. In the Inspector window, change the Atlas Width parameter to 4096
4. Press “Apply” and save the project (Ctrl+S)
5. In the project window, open the context menu of “NotoSans-Regular SDF“ Font Asset
6. Select the “Show In Explorer“ option
7. In the opened File Explorer, open the selected file using a text editor
8. Find the line containing “AtlasWidth:…” and observe its value

Expected result: The value was changed to 4096
Actual result: The value remains 1024

Reproducible with: 6000.0.21f1
Couldn't test with: 2021.3.44f1, 2022.3.48f1 (Font Asset has missing scripts)

Reproducible on: Windows 11
Not reproducible on: No other environments tested