i didn backup my iphone xr

See:

Restore your iPhone, iPad, or iPod touch from a backup https://support.apple.com/en-us/HT204184

Restoring an iPhone, iPad, or iPod touch backup from iCloud or from a computer when a later version of iOS is required https://support.apple.com/en-us/HT203434

Try doing a factory reset. Since you don't have a backup, you will lose any data you had.

Restore to Factory setting.