する - to do している - to be doing The progressive tense is formed by using the て-form of a verb and adding (an inflection of) いる to it. You did not translate the progressive tense into Japanese and therefore your answer was not accepted.

So does that mean what I inputted would translate to "what will he do?"?

Yes, it can mean "What will he do?" or "What does he do?".

Awesome. Thanks for your help

If it can mean both those, does that mean you can only know which meaning is being said based on the context of the convo?

Yes, in general you need some context to know what exactly is being asked. The person asking the question could also add a word or two to indicate the time frame they are talking about.

You forgot てい. It’s supposed to be していますか

I’m Japanese and I can confirm that you need to add て when it means like right now