Both abilities are still not fully functional yet (Battle Bond does not interact with Water Shuriken yet, Power Construct does not interact with 10% Power Construct Zygarde, and both forms do not revert after a battle yet), but this is a step to having them both completed.
Battle Bond Froakie line and Power Construct 50% Zygardes (as well as Aura Break 10% Zygardes) can now randomly appear in the wild.
Expect Battle Bond to potentially change to its Gen 9 version at some point in the future, rendering Ash-Greninja inaccessible.
Matthew