I’ve read the FAQ, and the starting guide, must have skipped over the part where it tells you how long your PIN should be?
Things do move faster than some of the documents can be updated.
Currently the system is trialing new entry of credentials and the account does not have an entry for a pin. Test 6 network had just one password/phrase, the next test is going to trial using 2 password/phrases and evaluate the user experience.
Have a read here