There are two ways to use this mode in Windows 10. Either click on the Task View icon on the task bar (shown below and highlighted in red), or press the Win-Tab keys simultaneously.

How to create multiple desktops on Windows Windows 11 Open Task View: Press Win + Tab to access Task View, showing all open windows and virtual desktops. Create a New Desktop: ...

However, you can use a combination of built-in features and third-party tools to mimic Expose. Using Task View in Windows Accessing Task View: Press the Windows key + Tab to open Task View.