I wonder what happened to “Business Chat”. It was announced on WWDC in 2018 and I have seen no progress since. It’s a shame. The potential of it is huge I believe, but Apple has a different focus it seems.
It exists for some retailers, like Home Depot. It doesn’t work like I would expect though, in HD’s case it looked like it was routed through a Salesforce extension.
It still exists; Apple themselves uses it for support and I hear some third parties have adopted it. (Though I haven't heard of many people actually using it…)