Questions for experts here.

I am currently using IP6 on IOS12. Backup is to Itunes. Obviously I will not be able to update to IOS13.

If assuming I wait for IP11, and it comes with IOS13, will I be able to still backup to Itunes and restore to a new IP11? Or do I have to get an IPX with IOS12, restore, then upgrade to IOS13?

Reason for asking, I remember I had challenges when restoring iphones on different IOS. Or was it having problems restoring newer IOS to older ones.

Thks in advance for replies.