Nostrudel didn't allows you to do it neither, listr.lol its the only one. Nostree too, but its not very intuitive
Discussion
I pin the list and it's in the feed catalogue https://nostrcheck.me/media/592295cf2b09a7f9555f43adb734cbee8a84ee892ed3f9336e6a09b6413a0db9/c102045ca0ceb1bd72fa51ab237fc4d10dad258023084d4ad42294b3697c0076.webp
Yes, but pinning the list does not mean owning it, it's just a reference to that list in a list of pins that you create, so it would not be available in amethyst or similar.