Unity UI components in the inspector link to help pages when you click the ? button, so why not TMP ones which are basically the default versions?
TMP_InputField for example
In fact did Text Mesh Pro documentation even get beyond TextMesh Pro Documentation ?
Edit: There is UI Text GameObjects | TextMeshPro | 4.0.0-pre.2 but it has at least 1 broken link in and does not document all components in UGUI using TMP