How to reproduce:
1. Open the user's attached project in 2020.3 (URP <= 11)
2. Select "Point Light 2D" in the Hierarchy
3. In the Inspector view, under the Light 2D (Experimental) component, observe that the Alpha Blend on Overlap setting is enabled
4. Upgrade the project to 2021.1.0a10 and above (URP >=11)
5. Select "Point Light 2D" in the Hierarchy
6. In the Inspector view, under the Light 2D component, expand the Blending section
7. Observe the Overlap Operation setting
Expected result: Overlap Operation is set to Alpha Blend
Actual result: Overlap Operation is set to Additive
Reproducible with: 11.0.0 (2021.1.0a10), 12.1.6 (2021.3.2f1), 13.1.8 (2022.1.0f1), 14.0.2 (2022.2.0a12)
Not reproducible with: 10.9.0 (2020.3.34f1, 2021.1.0a9)