How can one make up missed prayers while ensuring the performance of the 'Isha prayer on time, given the time constraint?

It is not permissible to let the prayer time expire, and work is not an excuse for that. Rather, prayer must be a priority, because it is the greatest act of worship for which Allah created humans and jinn, as He Almighty said: "And I did not create the jinn and mankind except to worship Me." (51:56) It is obligatory to arrange between the missed prayers and the 'Isha prayer, as long as the time for 'Isha has not become narrow. One must hasten to repent and resolve not to return to this act.