Very optimistic.
Android 16 comes with additional eBPF feature requirements to the kernel, which the 4.4 version the Pro1 is stuck on doesn't fulfill, but the Pro1X's 4.19 kernel version does. Or rather, those have been backported down to that version, but nobody has done this for 4.4 yet.
See the LineageOS announcement for some details: https://lineageos.org/Changelog-30/
It may happen, but not within a few days if it does.