You need to give us more info about your tag, if your phone reads it use an app like NXP Tag Info and post screenshots of the specs.
If it doesn’t read with you phone then it’s probably low frequency.
Photos of the reader/card and manufacturer can help too.
Some but not all:
Any NFC (HF) chip that can do NDEF (almost all).
The XSIID has lots of storage and an LED.
The xM1 has a changeable UID (not really relevant in this case).
The spark2 doubles as a Vivokey authentication.
These are all glass capsules.
There are larger flex equivalents