Reproduction steps:
1. Open the attached “ASDQWE” project
2. In the Project Window, select the “ShadowReceiverOpaqueDoubleSided.Shadergraph” Shader Graph
3. In the Inspector Window, press the “View Generated Shader” button
4. In the generated shader, search for “Unity_Blend_Overlay_half”

Expected result: Half floating point uses half values (example of this: half result1 = half(1.0) - half(2.0) (half(1.0) - Base) * (half(1.0) - Blend);)
Actual result: Many values use full float precision (example of this: half result1 = 1.0 - 2.0 * (1.0 - Base) * (1.0 - Blend);*)

Reproducible with: 2021.3.36f1, 2022.3.21f1, 2023.2.13f1, 2023.3.0b10

Reproducible on: macOS 14.3.1 Sonoma (Intel), Windows 10 (user’s)
Not reproducible on: No other environment tested