Reproduction steps:
1. Open project “TextureCompress.zip”
2. Expand "washing_machine.glb" subassets in the Project window and select the “Texture_1” texture
3. Observe the texture having MipMaps (slider at the top right corner of the texture) through the Inspector
4. Select "washing_machine.glb" in the Project window
5. Select any of the options for “Compression\Texture Compression” in the Inspector and click Apply

Expected result: EditorUtility.CompressTexture keeps the same MipMaps
Actual result: the textures don’t have MipMaps anymore

Reproducible with: 2021.3.30f1, 2022.3.9f1, 2023.1.13f1, 2023.2.0b9, 2023.3.0a5

Reproducible on: macOS Ventura 13.2.1 (Intel)
Not reproducible on: no other environment tested