Assuming your product is targeted for the US market, you can surely launch your product in the U.S. even though you are outside.

I am working with a couple of startups that have the core tech/leadership team that is international but still have a presence in US. They are seeing operational/financial benefits to the model in early stages of product/market development. As they are seeing traction, they intend to hire sales/BD functions here.

You are able to form your company, have a remote office and complete all the legal formalities even though you are outside the US. Happy to share detailed feedback over a call and help with your decision making.