Coordinated turns - inclinometer in telemetry?

I’m working towards a fixed wing platform to try ArduPlane.

As a pilot of “real” airplanes, I was wondering about how ArduPlane deals with coordinated turns. Or at least an inclinometer in the telemetry.

I found this article: Yaw and Yaw Control in Plane — Plane documentation

As I understand it, ArduPlane doesn’t use the IMU’s accelerometers to keep turns coordinated.

Is this the current state of development? Is there anything being discussed or developed to enhanced this?

Anyone flying gliders with FPV would love to have a variometer and inclinometer in the OSD.

Thanks!