B.G 5.02

श्री भगवानुवाच
संन्यासः कर्मयोगश्च निःश्रेयसकरावुभौ। तयोस्तु कर्मसंन्यासात् कर्मयोगो विशिष्यते ॥२॥

śrī bhagavānuvāca
saṁnyāsaḥ karmaYōgaśca niḥśreyasakarāvubhau। tayostu karmasaṁnyāsāt karmayogo viśiṣyate ॥2॥

The revered Lord Said:
Definitve good results from both Yōga-of-action and Yōga-of-renunciation. But, between the action and renunciation, the Yōga-of-action is special.

Gīta Bhāshya 5.02

The word 'saṁnyāsa' in the current context refers to dispassion. It does not refer to monkhood.

The word 'sanyasa', i.e. renunciation in the current context, does not mean monkhood, the fourth order of life.

"Worship of Me is superior compared to giving up dualities because of renunciation."

- states a proverb.

"He indeed advocated giving up of these lower forms of austerities."

-stated thus as well.

"Indeed, the fourth state, (turīya, i.e. beyond sleep, dream, and awake) which is identified with non-activity, has its own virtues. In the world, no other superior duty (dharma) comes to light compared to it. Even the householder, who is the follower of dharma, cannot go there, where the devotee goes. Dispassion is described as the eligibility to become my devotee. When a person becomes eligible, even a celibate student can take up monkhood."

-states Naradiya Purana.

"Even from the celibate student phase, one can take up monkhood, just like the day that illuminates immediately."

-stated thus as well.

"Indeed, my affection towards monastic order is greater. Certainly there is no need to engage in worldly actions for those who are eligible for the fourth order (i.e. monkhood)."

- so commanded in the Brahmanda Purana.

Therefore, in this context, the fourth order of life, the monkhood, is not referenced.