Hi,
I am Sumit, an Independent Advisor and a 3 year Windows Insider MVP here to help.
The easiest way:
Right-click Start and choose run:
Type %appdata%/ and press enter.
Click Alt+Up arrow keys on the keyboard to go one folder back. You would see Local folder.
Then Navigate to EpicGamesLauncher\Saved\Logs
Otherwise, you would need Windows Explorer. Click View>Hidden files before.