at what level can i create more things??

i think i am on alchemy level 10

havent played with that in ages, but afaik this is up to date

https://subeta.net/forums.php/read/10274

The thread sent you to is still accurate, but it is missing the newest items.

If you check out this pet: Trajan, it has newer info.

Also, if you hover over items made with alchemy you'll see one of the stats displayed is Level.