That will only work on older Homey’s, and it works by keeping an NFC tag against Homey. That might be useful in some cases, but most of the time people want to use their phone to scan an NFC tag and then trigger a flow.
The NFC trigger card provides a tag/token that contains the tag-ID so you can send yourself a push notification with the ID, or make a timeline notification. Then use the specific “Tag XXX is detected” trigger card to start a flow when the tag with that ID has been scanned.