Hi mona.jalal,
Are you using the devkit or custom board for AGX Orin?
What’s the Jetpack version in use?
To customize the logo, you have to rebuild the UEFI source.
Please refer to Customized Logo for details.
To remove the text in the screen, please refer to How can I remove text printing from the UEFI Logo interface? - #6 by KevinFFF