I’m always hopeful, but there was another state/city in Germany (Munich I think?) that tried to do this a long time ago, then after 10 years of not being able to move entirely over, they moved back to MS, then I think they tried again. Really flip-flopped a lot. I think stuff like this needs to be more organic in its movement rather than big bangs and milestones. Just let it creep in and take over.
From a glance at the pne64 blog there hasn’t been a mention of PinePhone since Feb 2022 though. It doesn’t appear to be particularly active on that product.