Epson reached out. They are aware of this post.
I did some tests on my P800. ABW does work as it should. But there's a major caveat and more testing is in order.
In Photoshop, setting up the Ventura and driver is super wonky and buggy! It seems some items that should be selected, after being selected do not stick or options in the driver can't be selected.
First off, check Color Matching! Since ABW is using "Epson Color Controls", that radio button should automatically be selected and grayed out. Sometimes it is, sometimes it isn't. You simply must check every time! This graying out is all an Apple API Epson/Adobe has used for years, it usually works. In this case, I'd blame Apple!
Next, I've seen cases where I can't select ABW from the dropdown option. It is grayed out (WTF!). If i go back into Color Matching and have the option to check the radio buttons, toggle and after the correct selection (Epson Color Controls), ABW can now be accessed.
Third, if I setup everything correctly, click "Save" and go back into Photoshop's print dialog, then check again, well at least once, ABW didn't stick despite selecting "Save". It's all a hot mess!
I need to try this all again with the 3880, making sure before actually clicking on the final "Print" button, all is setup and sticking. You guys should as well.
At that point, I can try Epson Print Layout. But it is very possible, the issues in Photoshop affect EPL as well.
At this point, I have to 'blame' Apple; all was working prior to Ventura. I'm biased. Their new print GUI is simply amazingly awful.