Generally speaking, one layer and one attribute will add multiple animations of value changes

However, it is difficult to locate the desired key frame position. The most important thing is that the layer label is not bound to the key frame position.
Interactive method: select two key frames with changing values, add "key frame label", in the time window, a line will appear between the selected key frames, and the color of the line can be defined!

If it conflicts with the color animation, it is recommended to add a color line, just to distinguish the color key frames.
I hope the suggestions given can be helpful to other designers.