Yes-ish. The standard was released in 2017 so it's pretty comfortably over half a decade old at this point with very few devices available. And those devices that are available are pretty pricey and locked down given they are seen as more or less specialty equipment.

This compares to other WiFi standards which tend to proliferate quite extensively within a year or two of release. And LoRA (which HaLOW competes against) had a decent number of products available for far cheaper within the first few years after release (~2-3 years before HaLOW).