From https://pine64.org/devices/pinephone_pro/
Will you keep on producing and selling the original PinePhone?
Absolutely! There are many people who either need a less expensive option or simply aren’t ready to make the commitment to switch to a Linux smartphone just yet. The PinePhone will keep on catering to this crowd for the foreseeable future.
Moreover, we believe that the PinePhone will retain its position as the most popular mobile Linux development platform on the market due to its price point and broad adoption. We know that the development community depends on the PinePhone’s continued availability, so we will produce it for as long as there is demand and available components.