To correctly import a 2D sprite into Godot, you should export it from your design program such as Figma at the correct size and resolution. To ensure the best results, make sure the size is exactly the same as it will be displayed in Godot, and the resolution should be set to the display resolution of the device/emulator you are using.
Also, make sure the "Filter" option is set to "Nearest" when you import the image in Godot. This will ensure the sprite displays without any blurring or aliasing.
Finally, if you need to scale the sprite within the Godot engine, make sure to turn off Filter Remapping in the Sprite's Inspector. This will keep the sprite's size and resolution consistent.