RFID locks use the UID of the chip so in some cases you can just add the tag to the accepted badges or alternatively change the UID of your chip to that of a fob you already have (which can vary depending on the specs of the lock and what protocol it uses.) The NExT also has a High Frequency NFC side that can be used for many different things as well.
The Spark 2 on the other hand is a part of the vivokey ecosystem which you can read about here
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