Yes, Space X would send a team in, grab the engines and rebuild them along with making them 30% more efficient and do it under budget and under time.
Then in their next hour on the job they would would grab a coffee, launch their own gear and call it a day.
NASA = We have stolen Hundereds of Trillions of dollars from joe public, and they still believe we are scientists.
SpaceX is already building a FACTORY to churn out combination Saturn V + Space Shuttle equivalents, built of cheap steel and fully reusable. They’ll test the second stage this week. First stage is being constructed now, just a scaled up version of what they’ve been reusing for years.
And they’re doing it in tents on a beach.
SLS can’t even get past a single engine full cycle test.