Performing Hajj is not compulsory after Umrah. While both are important Islamic pilgrimages, Hajj is a mandatory pilgrimage that must be performed at least once in a Muslim's lifetime if they have the financial and physical means to do so. Umrah, on the other hand, is a non-mandatory pilgrimage that can be performed at any time of the year.
Completing Umrah does not fulfill the obligation of Hajj, and Muslims who have performed Umrah are still required to perform Hajj if they have not already done so. However, performing Umrah can be a good way to prepare for Hajj, as it involves similar rituals and can help to familiarize pilgrims with the holy city of Mecca.
In conclusion, while performing Umrah is not a requirement for performing Hajj, it can be a helpful preparation for Hajj and can provide additional spiritual benefits. Muslims who have performed Umrah are still obligated to perform Hajj if they have not already done so.