Content that appears in the preview before opening the file does not appear once
Accepted solution
"preview" is not a live look into the file, never has been: it's a historical raster image snapshot taken the last time the file was successfully saved.
If you are missing content you need to talk to the file creator that sent you the file.
In this case, your file has major issues:
PLUS all of these garbage items:
DGN Data.................. | Purged : 3630
DGN ComplexData........... | Purged : 124530
Annotation Scales......... | Purged : 18
Line types................ | Purged : 13
Text Styles............... | Purged : 42
You and the file creator need to be working together to fix these files. See attached, I attempted to fix it for you.