I saw this when I had to get new machines 7-8 years ago. However they were an extra like $300 for each machine. wtf.

I would kill for some sort of audio out or usb, but even better would be Zigbee/z-wave/thread, and you can do it for less than $20 in parts.

Now that Matter/Thread has standard profiles for laundry machines and has a chance of building interoperability, I hope my next machines will, for a reasonable cost and no cloud requirement