JavaFX controls which are embedded into native applications or in SWING applications are not recognized by TestComplete. The Object Spy is not able to find JavaFX controls inside JFXPanel. JavaF...
TestComplete 12.30 supports JavaFX controls in Swing applications.
Support for JavaFX WebView is tracked in a separate feature request:
https://community.smartbear.com/t5/TestComplete-Feature-Requests/JavaFX-WebView-Control-Support-Testcomplete/idi-p/95738