How do I make two wall switches work in coordination, wirelessly?
There are half a dozen ways one could do this, but I would do it this way

Purchase 2 Lutron RF Maestros. ( The RF part is important, as they sell none RF Maestros too) ( for non dimming use MRF2-6ANS )


One Pico wireless switch

One Pico switch plate adapter

One 2 gang decor plate

Change both switches to the RF Maestro and put the Pico next to the switch that controls the recessed lights using the Pico adapter and 2 gang wall plate. (No cutting necessary).
Program the Pico to turn on both RF Maestros and you're done.
If using electronic or magnetic LED the Maestro will need to be compatible and same goes for the recessed lights.  But since you are not dimming these you do not need to worry about that nor would you need to worry about the wattage.