If you are not a Muslim, then I do not see any reason to visit and dress in canonically acceptable unwashed clothes, previously worn by many visitors. An architecturally unremarkable religious institution.
The mosque is made in the form of umbrellas: a large umbrella is the main dome of the chapel, a minaret in the form of a folded umbrella, and a small umbrella is the mausoleum where 4 political leaders of the country are buried.
The mosque is built in a modern style. Large-scale, luxurious, thorough. It is of no real historical interest, since it is modern and built recently. At the same time, the religious significance is enormous: the mosque is the largest in the whole of Southeast Asia and can accommodate 15 thousand believers at the same time. There is a small park with fountains around the mosque.
Visiting time for non-Muslims:
1) from Saturday to Thursday from 09:00 to 12:00, from 15:00 to 16:00 and from 17:30 to 18:30
2) on Friday from 15:00 to 16:00 and from 17:30 to 18:30.