I have added in a page an Offcanvas and enabled the No Backdrop option.
The Offcanvas doesn’t hide on clicking outside the Ofcanvas but I can still click on the elements (buttons, lightbox, tagify etc…) behind it on my page…
When backdrop is set to “No backdrop” the semi-transparent background overlaying your page content is not being shown, so that it is possible to click and/or select your page elements.
That is the expected behavior.