It seems indeed to be a new version of the Birdy that will first appear as a limited edition P40, not only a limited edition produced only once as the Titanium Birdy (BTW. was this really the case ? Some Pacific Cycles dealers talked of a second batch of Ti Birdy in 2020).

If it is a new version, it could require some alignments/agreements with Riese & Müller that could explain the delay.