I didn't download the door you're showing, but the Reveal parameter is only enabled with certain other parameter settings for built-in doors. This used to be related to the wall type (stud, composite, etc), but at least for one door in the USA library, it is disabled when the default setting of "Frame Surrounds Wall" is checked. Unchecking it enabled the reveal parameter. Perhaps something similar might work for the downloaded door?
One of the forum moderators • AC 26 USA and earlier • macOS Ventura 13.2.1, iMac Pro 10-Core, Radeon Pro Vega 64