Reproduction steps:
1. Open the attached project "ReproProj"
2. Open the “/Assets/Scenes/MenuScene.unity” Scene
3. Build and Run
4. Observe the gradient image in Player

Expected result: Gradient image is smooth and not banding
Actual result: Gradient image is banding

Reproducible with: 2021.3.29f1, 2022.3.8f1, 2023.1.10f1, 2023.2.0b6, 2023.3.0a3

Testing environment: Windows 10 Enterprise 21H2

Reproducible on:
VLNQA00477 - samsung Galaxy S22 (SM-S901B), CPU: Exynos 2200, GPU: ANGLE (Samsung Xclipse 920) on Vulkan 1.1, OS: 12

Not reproducible on:
VLNQA00332, Samsung Galaxy XCover4 (SM-G390F), Android 9, CPU: Exynos 7 Quad 7570, GPU: Mali-T720
VLNQA00325, Samsung Galaxy Note10 (SM-N970F), Android 12, CPU: Exynos 9 (9825), GPU: Mali-G76
VLNQA00318, Oneplus OnePlus 7 Pro (GM1913), Android 11, CPU: Snapdragon 855 SM8150, GPU: Adreno (TM) 640
VLNQA00231, Samsung Galaxy A5(2017) (SM-A520F), Android 8.0.0, CPU: Exynos 7 Octa 7880, GPU: Mali-T830
VLNQA00231, Huawei HUAWEI Mate 20 Pro (LYA-L29), Android 9, CPU: HiSilicon Kirin 980, GPU: Mali-G76
VLNQA00379, Oculus (Quest 2), Android 10, CPU: Snapdragon XR2, GPU: Adreno (TM) 650