Convert IQ 2 panel to remote only

I recently upgraded to the IQ 4 panel, is there a way to convert the old IQ 2 to a remote of the IQ 4?

Two main panels cannot be connected in the same system. The IQ Panel 2 cannot be used as a secondary keypad.

For the IQ Panel 4, the IQ Remote PowerG is the secondary keypad option with the same UI.