Yes, that is my impression. However I am not sure about the value -4096. I am just using these settings as in the attached picture. Same settings is fine with PMDG 737. I believe Asobo B787-10 and Kuro B787-8 behaves same like the Horizon B787-9 one, since they almost stop when landing on the runway with the thrust reverser handler active.
I am using of latest FSUIPC v7.3.25.
The throttle handler has reverse handlers but act as a button when dragging them backwards. See link below.
https://www.etsy.com/se-en/listing/1316706721/boeing-737-thrust-lever-full-set-for-the?ga_order=most_relevant&ga_search_type=all&ga_view_type=gallery&ga_search_query=boeing+737+throttle&ref=sr_gallery-1-1&referrer_page_guid=f73330f6ddd.c55a0b33f5c18965b7b6.00&organic_search_click=1