Can someone who is not currently in a Howza or considering joining it in the future wear the Moulana attire, including the Qaba, Aba, and Amamah?
Bismihi ta'ala
The uniform of Hawzah students is now commonly worn after completing a minimum amount of studies, no less than 5 to 7 years, qualifying him to have the moral standards of 'Ulama and efficiently share Islamic knowledge and answer shar'i questions.
This would also mean he has surpassed this time and studied full-time in a well-established and recognised Hawzah, like Najaf, Qom, Mashhad, etc.
With prayers for your success