How has becoming (grammatical structure)

I saw this question starts with

How has becoming a pilot has enriched your life as a mother and wife?

Could anyone please explain why the question phrase, how has becoming... - is grammatically correct?

Becoming a pilot is a gerund, also called gerund participle, and is the subject of your example sentence, just like exercise here:

How has daily exercise enriched your life as a wife and mother?

What isn't grammatical is the insertion of an additional has:

How has becoming a pilot has enriched your life as a mother and wife?

I have also reversed mother and wife because the order of those gender roles is virtually fixed in English.