To reproduce:
1. Create a new project using Universal RP template or open any existing URP project;
2. On pipeline asset > Shadow > Normal Bias slider - attempt to drag the slider all the way up to 10;
3. Select Directional light > Realtime Shadows > Bias > Custom;
4. Attempt to drag Normal slider up to 10.

Expected result: it is possible to drag Normal Shadow Bias slider on the light to 10
Actual result: Normal Shadow Bias is capped at 3

Reproduces with: 2019.2.19f1 + LWRP 6.9.0, 2019.3.0f5 + URP 7.1.7