Textures appear compressed in the editor, but compression is not applied in the actual build.

I am currently developing a mobile game, but the image files are not being compressed. I set the compression format of each image file uploaded to Unity as ASTC 6x6 and clicked the APPLY button, and it appeared that the images were compressed within Unity. However, after building the game and running it on a mobile device, I found that the image files were not compressed. In the Build Profiles, the Texture Compression property is set to “Use Player Settings.” Additionally, I have enabled the “Override for Android” property for each image to ensure compression settings are applied. I’m wondering why the images are not being compressed during the build process.

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