Hello HT VSH
Welcome to the Microsoft community. and hope you are doing great.
I am aware of the present situation is that your File explorer has been changed since the latest update, since you were previously posted to the Microsoft 365 and Office community, I can't yet confirm whether you are currently using Windows 11 or Windows 10.
The following results are based on Windows11. Right-click the blank area in the left navigation bar of File explorer and select show all folders, as shown in the following figure:
You can expand the subfolders, as shown below:
Hope it helps! If any update, welcome to share with us.
Best regards,
Chandy|Microsoft Community Support Specialist