how can i restore my iphone to yesterday backup

Yes, if you have a Backup from yesterday, then you can read here how to make a restore from it:

Restore your iPhone, iPad, or iPod touch from a backup - Apple Support

While you can restore from a backup made yesterday, just a quick note to point out that if you have updated the iPhone to iOS 15.5, you won't be able to "go back" to the previous 15.4 system, if that might be what you are trying to accomplish with the "restore".