NZF CEO Andrew Pragnell said the fixture is dependent on stringent health and safety measures being met, but the organisation is confident it will go ahead.
"Putting on any sporting event in these times is challenging but the return of professional club football over these past months, and now international football across Europe has been very encouraging. The number of Kiwis playing professional football in Europe now makes fixtures such as this more viable at this time.
"A few months ago it didn't look like international football would be able to happen this year ... however, being proactive in our planning like this will ensure we don't miss out on opportunities to best prepare the All Whites for 2022 Fifa WC qualification."
The New Zealand men's side has never faced Belgium in international competition before.
The All Whites may have to play three 2022 World Cup qualifying games within one Fifa window next year, as a result of the Covid-19 disruptions.
Under that scenario, all of the European and American-based players available to Hay would likely miss at least one match, given the travel implications.
New Zealand has World Cup qualifying matches scheduled for September (one), October (two) and November (two) this year.