I've tested on my S19-Pro and no it doesn't work. Just shows as Status: None
I wonder what has changed in the S19 series as far as the firmware/software/API level is concerned, I mean it's not like they upgrade the tool after every generation, also other software like AwesomeMiner do work on S19 as far as I can tell, also the BTCtool you mentioned above, I highly doubt any upgrade was needed by these tools, it must be something wrong with the APminer tool itself, someone should send them an email and see what they have to say.