Boot problem

iam having dual boot(windows and Ubuntu) in my system, i was using ubuntu 20.04 LTS after i updated to ubuntu 22.04 iam not getting boot option for selecting windows or ubuntu which earlyer was there now only its showing ubuntu.

This site isn’t designed for technical support. The Finding Help topic details where you can get support for Ubuntu. Keep in mind that pre-release software (22.04) is not supported by AskUbuntu.