What I mean by my question is:
All the actions of ‘Umrah are obligatory, so is it possible for a person to do tawaaf (circumambulation of the Ka ‘bah) after ‘Isha’ prayer, if he reaches Makkah before ‘Isha’ time?
There is no specific time for circumambulation of the Ka‘bah (tawaaf); rather whenever a person who wants to perform Hajj or ‘Umrah, or the person who wants to perform tawaaf, reaches the Ka‘bah, he may perform tawaaf at any time he wants of the night or day, even if that is during the times when the prayer is disallowed, because the Prophet (blessings and peace of Allah be upon him) said: “O Banu ‘Abd Manaaf, do not prevent anyone from circumambulating this House or praying at any time he wants, night or day.”
Narrated by at-Tirmidhi, 868; classed as saheeh by Shaykh al-Albaani.
And Allah knows best.