No. Knockout 2 v10387 was a designed for the legacy Photoshop plugin API (8bf format). Adobe dropped 32-bit plugin support in Photoshop CC 2018 (and even earlier on macOS Catalina+). To use Knockout 2 today, you would need:
Why do so many people still search for “Knockout 2 free”? Because it worked well. But downloading a 15+ year-old plugin from shady sites is hazardous: knockout 2 v10387 plugin photoshop free new
The search results indicate that Corel KnockOut 2 is a legacy masking and cutout plugin for Adobe Photoshop used to preserve fine details like hair, smoke, and glass. The specific version knockout 2 v10387 plugin photoshop free new
: Use the Outside Object tool to draw a line just outside the subject's edges. knockout 2 v10387 plugin photoshop free new