The 1.3 version of Audirvana plus for Windows 10 now integrates support for VST3 plugins. Restart Audirvana plus to get the update to the new version 1.3 and you will be able to use your equalizer and your preferred acoustic corrector.
In addition, the installation directory is set by the VST3 standard. So just use the plugin installer and then restart Audirvana plus.
For information, there will be no development of VST 2 for Audirvana plus for Windows 10. Indeed, Steinberg announced 5 years ago that the VST2 format was obsolete and replaced it with VST3. The end of the transition period ended in October 2018 by the complete deletion of the support and SDK for VST2.
For more information about deleting VST2 by Steinberg, feel free to read the Steinberg release.