No MipMaps are created when using "UnityWebRequestTexture.GetTexture"

Reproduction steps:
1. Open project “MipRepro”
2. Open scene “SampleScene”
3. Enter Play Mode

Expected result: the loaded texture has mipmaps and a Log Error is thrown with a number higher than 1
Actual result: the loaded texture does not have any mipmaps and a Log Error (“1”) is thrown

Reproducible with: 2020.3.45f1, 2021.3.18f1, 2022.2.4f1, 2023.1.0b2

Reproducible on: macOS Catalina 10.15.7 (Intel)

Note: Also reproducible in Standalone Player