One requirement for device maintainers is “If any device specific issues come up during the testing the device maintainer is expected to resolve those issues before sharing the final working build with the users”. I am unable to fulfill this requirement, so I can not become a maintainer.
However have a look at this: According to [Device Roadmap] Android 9 (Pie) & 10 (Q) : The plan
the team intends to add xz2c to their list of supported devices (no time estimates given).