How to use jogging and M3 power mode at the same time?

This is not a difference between M4 and M3 mode, this is either settings being incorrect or you trying to move the machine faster than it is allowed to. Make sure that the S-value max setting in the Device Settings in LightBurn matches the $30 value in the controller.

Then make sure you are not asking the controller to move faster than the limits imposed by $110 and $111. If you do, it will reduce the power output to compensate for the lower speed.