Hi Robb, welcome to Hubitat.
I haven't used the TRÅDFRI Shortcut Button, but searching the community, there is a community driver for it: [BETA] IKEA TRADFRI Shortcut Button.
Many devices say you need their particular hub, they want to lock you into their ecosystem. However, many devices, if they are Z-Wave, Zigbee, or IP, will work with Hubitat. For instance, I use Hue button controllers, directly from HE. You can check for devices in the compatibility list: List of Compatible Devices - Hubitat Documentation. Also, if you have a device in mind, you can search the community for other people's experiences.
