@Emil You still claim HomeKit support on the Kickstarter page, starting from year 2022. Saying just because you asked where do you exactly say it.
It is under umbrella of the "Matter". Overall both advertising and language is often in line of "control every aspect of Your Smart Home", which might be a bit misleading in the Apple world.
Listen Emil, think a lot of people's upsetness about lack of integration supports could be handled by openly telling where the progress is going. You for example blog about sustainability, but I think waaay bigger part of the customer base would like to hear some progress reports on the Home Assistant, Matter, etc. support development. Game devs have been doing this since digital delivery and people actually are really good at waiting as long as they can see the queue in front of them.