Question PCF size in URP?

In the HDRP documentation it lists different PCF sizes for shadow filtering quality settings. I can't seem to find that info in the URP docs. Out of curiosity, What is the PCF size in URP? 3x3? Also, What does it mean when it says 4 taps and how many are in URP?

https://docs.unity3d.com/Packages/c...gh-definition@6.5/manual/Shadows-in-HDRP.html

 

I don't think URP is using PCF.

Edit: I stand corrected see replies below.

 

Further reading to help explain Unity's optimized PCF shadow map anti-aliasing and bilinear tent filtering using various kernel sizes:

Unity built-in shader source from 2016:
https://xibanya.github.io/UnityShad...tinShaders/CGIncludes/UnityShadowLibrary.html

Two articles linked in the above source code:
http://the-witness.net/news/2013/09/shadow-mapping-summary-part-1/
https://mynameismjp.wordpress.com/2013/09/10/shadow-maps/

Excellent article from a series on custom scriptable render pipelines in Unity:
https://catlikecoding.com/unity/tutorials/custom-srp/directional-shadows/

Article is translated from Chinese, but is a good explanation of PCF and tent filtering in Unity:
https://zhuanlan.zhihu.com/p/369761748