I think the partitioning itself is fine, but I wouldn't have 3 operating systems on a 256 GB NVMe, because I'd be running out of space a lot.
if you won't ever use Windows, you can nuke it. Then I'd consider making one of the Linux ones a VM - if you're trying out that distro. That will cut down 12 partitions to 5.
Lastly, you can look into btrfs to make better use of space between (the current) p11 and p12: you can make them subvolumes that won't eat up each other's storage when not in use.