Appropriate settings used will vary greatly depending on the area, their equipment, skill, and other factors. There isn’t a fixed setting for a given skin and hair type so it is impossible for us to tell you what settings they should be used. Settings can even vary from treatment to treatment, depending on one’s hydration etc.
You can’t see your electrologist inserting the probe and doing their work, especially on the face, so you can’t really tell if they are using a suitable needle. You could ask your electrologist to show you the needle and the hair being treated through their magnifier though.
They should at least be using a needle that matches the diameter of the hair, if not the largest needle their equipment and skill allows to be safely and accurately inserted into a given follicle.