Yeah wasn’t sure if that would help or not just thought I’d suggest.
Normally for lerping any rotation I find it’s best to use the rotation lerp because it has the shortest path check which helps, so for a single axis I’d just do like this.
Run the lerp on the full rotation but then only use the yaw value at the end. In that example I am running it on tick but you could run it off any repeating code, if you’re running slower than delta time you’ll need to take that into account too as the alpha value based on the tick rate of the code will give you your overall speed.