Scope of program, from official sources, is deeply improbable: Secure chips for government use. Intel should design secure chips by default. Government should have its own testing center to ensure/help Intel improve their chip security through feedback. Offering Intel high prices for secure chips for government is a completely valid path to ensuring fab profitablity to making them. It would simply not require any secrecy to assist/ensure secure chip production/purchases.
Real purpose of Secure Enclave must be to design insecure backdoors for domestic and international spying purposes. Grants are needed because Intel doesn't profit from adding insecurity, and grants is the only possible compensation model for harming its customers.
US says it won't "demand a board seat". It still has 10% voting rights, and has convinced Intel to be an ally of the empire before this.