Technically you are correct but the commenter you’re responding to means that with the amount of Western Governments spend on MS products and services, the are a d facto (if not de jure) state backed enterprise.
In total across the entire US federal government, $518.8 million was paid to Microsoft for products and services in 2024. That is approximately 0.21% of their total annual revenue.
I assert that the threshold for "state sponsored" is well in excess of 0.21% of annual revenue.
Federal Spending: https://www.usaspending.gov/recipient/dd77b7c3-663e-cb91-229...
Microsoft Annual Revenue: https://www.microsoft.com/investor/reports/ar24/index.html
Government spending is not easy to track. This doesn't even begin to touch on non-monetary benefits Microsoft receives with government influence.