Installation Folder for WordPress 5.8.2 does not appear after installation from App Center.
By Default WordPress Folder should appear under '\\DataVol\Web\WordPress'.
Remove the WordPress 5.8.2.
Then WordPress 4.9.5.0.1 can be used as an alternate solution. The Zip Version can be downloaded via WordPress older release (https://wordpress.org/wordpress-4.9.5.zip). Installing WordPress from Zip is little different than QNAP Link (https://download.qnap.com/QPKG/WordPress_4.9.5.0.1.zip) .
WordPress Link - https://wordpress.org/download/releases/
QNAP Link - https://www.qnap.com/en/app_center/ (You need to Provide Correct QTS Version 4.5.3~4.5.4 to get WordPress 4.9.5.0.1 QPKG)
I will continue here QPKG Download. Unzip the Zip file downloaded from QNAP.
Open 'Install Manually' from App Center. Locate your QPKG file and Click 'INSTALL'.
Once Installation done, check for the WordPress Folder under '\\DataVol\Web' in your NAS.
