Backing up iPhone XR
How can I back up my phone? I
tunes is not on my MacBook.
iPhone XR, iOS 14
Question marked as
If you're using Catalina or later, iTunes was replaced by Finder for that job What happened to iTunes? - Apple Support
See this Backup methods for iPhone, iPad, and iPod touch - Apple Support
I also advise you to use a computer method, not only the iCloud one, so you'll have a full backup with things that iCloud doesn't save.