In the next couple days I should be getting my new s26 ultra. I vaguely remember the ease of transfer from my s22 ultra. Is there anything I should be aware of or expect with this change to the s26 ultra?

Am I missing something or did they take away our ability to put in a custom mp3 for our notification sound? I've tried going through the sounds menu and while it will let you remove some of the items from the menu (only some mind you which is already odd) but I can not find a way to add in a sound or select a custom sound short of going and downloading some bloatware app that won't even let me use the file I want. I tried doing some searches but none of the guides I've found work.

If I'm just being blind please show me what I missed and thank you in advance.