As stated in the title.  I am replacing HAI switches with KASA.  First time I have run into this issue.  HAI model # 37A00-1 is being used as an auxiliary switch.  This allows the switch to act as a 3 way with no 2nd traveler.  What is existing is standard 3 wire.

I checked the neutral think that maybe it was hot.  It is not.  I have continuity between that and other neutrals within the box.

Is there a KASA product that will solve my problem? i.e. Act as an auxiliary switch.

Thank you.

Mark