Generated android icons are not sharp?

[yaneony]

I've created an image icon, with a size of 1024x1024. As logo there is only one A letter. This letter is around 60% of an icon space. The problem is, that this icon looks like "upscaled" from smaller size on my Xiaomi MI 9T Pro. Asked frineds for check on different android devices, all say same, they are definitely not sharp. I've checked different images, sizes up to 4096x4096, all looks same.

As proof, here are both, screenshot and icon file.

Anything i'm doing wrong?!

[yaneony]

Anyone?

[SrBrahma]

up

Edit: I am now using https://github.com/aeirola/react-native-svg-app-icon, which I thinks it's better than this repo