Regarding combining two prayers

Answer (and Allah grants success): When the Prophet (May Allah bless him and his family and grant them peace) combined between Ẓuhr and ʿAṣr, and between Maghrib and ʿIshāʾ, the Muslims combined with him, as in the well-known ḥadīth of Ibn ʿAbbās. On that basis, the best guidance is the guidance of Muḥammad (May Allah bless him and his family and grant them peace).
Moreover, al-Amīr al-Ḥusayn—as in Yanābīʿ an-Naṣīḥah, upon the school of al-Hādī (peace be upon him)—mentioned that combining the two prayers in congregation is better than praying each at its time individually.
And in the marginalia to Sharḥ al-Azhār: “My father (May Allah have mercy on him) said: Rather, it is conceivable that the interest of the congregation is an excuse for combining if the imām has an excuse, or if the prayer would be missed by praying each at its time—such as the busy person who fears missing it by separating them.” End of Bustān; the muftī affirmed this
Source : Min Thimār al-ʿIlm wa al-Ḥikmah vol.1