Dear Forum Administrator,
Thanks for your replying immediately. As per your guidelines,
1. We renamed the file apple-touch-icon-120x120.png to apple-touch-icon-120x120-old.png in the folder /storefront/view/default/image/.
2. We uploaded our logo in the same folder as apple-touch-icon-120x120.png.
3. In our Admin panel, we cleared all cache.
4. in our google web browser, we cleared browsing data.
5. After doing this matter, we got our logo (favicon icon) in our Youtube Studio.
You're great in this regard.
Thanks once again to your good answering.
Thanks & regards.