Doubtless the early Christians followed the custom of the time and locality in which they lived, with regard to the wearing of a beard. The Roman custom
was beardlessness. Romans converted to Christianity would very likely
continue in the Roman custom, while converts from the Jewish community would continue in the Jewish custom of wearing a beard.
If early Christians could follow the customs of their time and locality then why do female witnesses have to follow western fashion customs from the forties and fifties and still cannot wear trousers?