Using remote button to turn on/off switches and set mode (Swann One Key Fob Remote Control SWO-KEF1PA, and ST Hub V3)

A couple of years ago there were people who tried to get those to work with SmartThings but it kept dropping off the network. They did create a DTH for it, so you could try that and see if it helps. Or ask in that thread and see if any of them did eventually get it to work. There have been quite a few changes in SmartThings zigbee implementation in the last few years, so it might work better now.