If you have an iPhone 11 or higher with iOS 13.1 or higher, you can now use NFC tags with your iPhone to trigger iOS automations (not SmartThings automations). This opens up all kinds of integration possibilities.
(Android users have been able to do this for quite a while, but iOS users didn’t have a good way of programming the NFC tags. Now it’s super easy. Also note that this will only work with an iPhone, not an iPad, and it has to be one of the newer models.)
Also, a cool feature is that you can set up an automation that will work for everyone on your home account or set up personal automations so that the same NFC tag will do different things for different household members.
See the example video at the always helpful HomeKit news
Technical details from the official announcement last June: