Hi,
Firstly, can I suggest using the forum search, as there are a LOT of issues with the IKEA TRÅDFRI 5-button Zigbee remote for battery life, Zigbee coverage, and events.
TL;DR - configure Zigbee firmware updates, get the latest 0x24040005 firmware to fix battery and Zigbee issues, then update HASS to at least 2023.03 to get the latest quirks file.
If the firmware and quirks file match, you should see events in Logbook, and device triggers in the automation editor. If the versions don’t match, you might not get any events, and nothing to select in the editor.
The most recent firmware 0x24040005 has fixed the battery drain issues for me, and it now uses Zigbee routers properly. The downside, is it changed the event model - hence the need for a new quirks file: