Well, Statement from President Joe Biden on Air India’s Historic Purchase of Boeing Aircraft is the official press release from the White House:
The United States can and will lead the world in manufacturing. I am proud to announce today the purchase of over 200 American-made aircraft through a historic agreement between Air India and Boeing. This purchase will support over one million American jobs across 44 states, and many will not require a four-year college degree. This announcement also reflects the strength of the U.S.-India economic partnership. Together with Prime Minister Modi, I look forward to deepening our partnership even further as we continue to confront shared global challenges—creating a more secure and prosperous future for all of our citizens.
Note that "support" and "create" are not necessarily the same thing, because the former can refer to existing jobs. (Some Indian press venues like PTI indeed expressed that as "create".)
I don't know how many could be reasonably be connected to producing 200 aircraft, but Boeing has about 150,000 US employees.
A multiplier of around 6 for indirect employment has been posited elsewhere, e.g. in the UK according to The Manufacturer:
Boeing also confirmed that its direct employment has now surpassed 2,000 – the company hired, on average, a new employee every day in 2015 – and that spending with the UK supply chain in 2015 was £1.8bn ($2.65bn), up from £1.4bn ($2.2bn) in 2014 and more than twice the £744m ($1bn) in 2012. [...]
Boeing spent US $2.2bn (£1.4bn) with UK suppliers in 2014 and the resulting economic activity — including exports — is estimated by Oxford Economics to have supported 12,700 jobs in the UK.
Oxford Economics also estimates that Boeing’s wage payments to staff supported a further 9,500 jobs in the UK in 2014.
So if we use that yardstick about 900,000 jobs could be indirectly supported by Boeing supply chains the US.
For some basis of comparison, for "durable manufacturing" more broadly, EPI claims around 3 supply chain jobs for every direct job and around 4.5 extra induced jobs (by spending), so overall something like 7.5 additional "total indirect jobs" for every job in "durable manufacturing". (I've done a bit of rounding here.)
In terms of direct, new hires, Boeing announced around 10,000 this year.
It's not unheard of to read claims of much larger indirect employment multipliers (than 6), e.g. one "France-Amerique" page (which is more or less a magazine supported by the French taxpayers/government, as far as I can tell) claims that Airbus "employs 3,200 people across 20 assembly and training sites [in the United States]. Through its suppliers, the European group has created 275,000 indirect jobs in the U.S.A, and contributes 16.5 billion dollars to the American economy every year." That's an indirect employment factor of around 86 being claimed there. They don't claim them directly in Airbus' supply chains though.