I suggest to extend the list of entry types with some general "PIN Code" entry. I use 1Password to store pin codes of my different smart cards (e.g. GPG cards, various ID cards and phone SIM cards). I currently use "Password" type for that, but then the watchtower detects them as weak. There is no way to override this warning. And they are not really weak as those are not regular passwords, but PINs. Closest solution I see is the "Credit Card" type with its "PIN" field. But it is kind of miss use of it, since those are not really bank cards.
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