Steps to reproduce:

1) Download attached project and open in Unity
2) Build and Run project on a device
3) Observe: No real-time shadows

Reproduced with:
2021.2.0a4 URP 12.0.0
2021.1.0b4 UPR 11.0.0
2021.1.0b2 URP 11.0.0
2021.1.0a10 URP 11.0.0

Not reproduced with:
2021.1.0a10 URP 10.2.2
2021.1.0a9 URP 10.2.2
2021.1.0a7 URP 10.2.2
2021.1.0a2 URP8.1.0
2020.2.1f1 URP 10.2.2

Regression since:
2021.1.0a10 URP 11.0.0

Devices under testing:
Reproduced with:
iPad Air3, SoC: A12, iOS: 13.2.3
VLNQA00126, Samsung Galaxy S5 Mini, 6.0.1, Exynos 3 Quad 3470, Mali-400 MP (Gles2)

Not reproduced with:
iPad Air4, SoC: 14, iOS: 14.0
iPhone 12Pro, SoC: 14, iOS: 14.1
iPhone XS, SoC: A12, iOS: 14.3
MacBook Pro (15-inch, 2017), 2,8 GHz Quad-Core Intel Core i7, Radeon Pro 555 2 GB, Catalina 10.15.7 (19H2), 16 GB 2133 MHz LPDDR3
iPhone 11, SoC: A13, iOS:14.3

Not reproducible on Android using Gles3 and Vulkan:
VLNQA00217, Razer Phone 2, 9.0.0, Snapdragon 845 SDM845, Adreno 630
OnePlus Nord, 10, Snapdragon 765G SM7250-AB, Adreno 620
LNQA00108, LGE LG Leon 4G LTE, 5.0.1, Snapdragon 410 MSM8916, Adreno 306