Slightly related, I had a Windrider cover on my previous Honda PCX bike, which I had to work with them a little bit on via email since my 2024 model wasn't in their list yet, but they had me take some specific pictures of my bike to send them and a couple weeks later my cover arrived. It did wrap over the whole seat, and did interfere a little with underseat storage with the velcro straps but otherwise a perfect fit. It did not interfere with the Honda's locking mechanism. It was a much more comfortable sit on and not slide around than stock seat.
I haven't been interested in getting one on my C400GT. The seats are far more comfortable than the Honda was and feel like this would interfere with the heated seats quite a bit. Maybe in the Summer time it would be OK though.... I'll follow this thread. If seat assembly / disassembly is required every time the cover goes on or off I'll probably pass.