Those two buttons should work with the stock drivers unless you have updated the firmware of the buttons (not possible to do in SmartThings anyway). What’s the firmware version of the 5 button?
You can try with my drivers, they work with the on/off and 5 button, at least with the old firmware. In the new one should work but I could never test it so it may not: [Edge] IKEA RODRET, SOMRIG and SYMFONISK Gen 2 Button Edge Driver
Don’t change the driver, delete it and pair it again.