Are there any identifying marks in the cap or on the nib at all? Is there a brass tube inside the cap or is it just material/plastic?
It looks like a Lamy style nib, but is not Lamy. My guess is that it is a Temu or Alibaba pen. I haven't seen any kits that use a Lamy style nib, but there may be something out there. Definitely not a standard Jowo, Bock, or IPG nib we typically see in kits.