I think HE just need to drop trying to get Apple certification and give Apple a birdie.
HE should just go for it and support all devices including door lock and garage door opener on Homekit. Nobody going to by HE because it's "Apple certificated" well maybe 1 or 2 would but they still would buy it if it wasn't certificated in the first place.
With all new "Homekit hub supported" hardware coming out, HE is going to have more competition to complete against when all other new hardware hub are not going for Apple certification and throwing everything at it to get into Apple ecosystem while HE may be steam rolled over trying to be one of Apple good ole boy.
Just screw Apple certification and throw everything you got into HE hub to support everything in Apple ecosystem.
Like someone is gonna buy HE because there's a nice shiny Apple certification badge on the box. LOL ....