Polygon is going through some upgrades that you prolly missing and might be surprised from matic became POL for its acronym.
I'll quote the important parts of this upgrade but you're free to read the entire article for your reference which is also included on this thread.
[...]
PIP-18: Polygon 2.0 Phase 0
....
The initiation of the upgrade from MATIC to POL;
The upgrade from MATIC to POL as the native (gas) token for Polygon PoS;
The upgrade from MATIC to POL as the staking token for Polygon PoS;
The launch of the Staking Layer and migration of Polygon public chains to leverage it.[...]
https://i.postimg.cc/HjZmCGZN/poly.png[/img]