No, the electrode will give an indication of cylinder temps but takes a very long hard run to burn it in.
The end of the insulator tells more about the plug heat.
On a new plug you can read soot deposition on the plug body, but takes a lot of experience to learn.
With a glass and a light you can peer down and read the smoke ring without cutting the plug but I can assure you that cutting the plug is the surest way to read your jetting.
A plug chop is the easiest, surest way to read jetting.
It will teach you how to use the other methods in time, but plug chops are where you start.