I came to post the same issue. I used the freeware version of 1.9 for years, but sadly Win11 would not install that version for anything. So I bought the latest version.
I liked the ability to keep the dock behind other maximized windows, yet still accessible by hovering.
The more they change things, the worse they work sometimes. Please put this very basic option back in.
ETA: I found the Accessibility options, but Autohide is "unavailable for multi-monitor systems".
When OSs change, some things are gained while others are lost. Windows 11 changed so frequently in the RTM and dev channels that Stardock and other companies were hard put to try to keep up. Stardock passed on the dev channel.
Windows 11 RTM version has things hard coded into it that Stardock can't change, and we all have to adjust to that until MS changes its mind yet again and loosens up. I'm sure basj has forwarded your problem and requests to the appropriate addresses. Realize basj has clearly been trying his best to be responsive to you and help.
You'll have to be patient just like the rest of us, until they respond.