This answer to Does NASA have an end-of-the-world policy? mentions the National Near Earth Object Preparedness Strategy and Action Plan.
Has this plan resulted in any action?
This answer to Does NASA have an end-of-the-world policy? mentions the National Near Earth Object Preparedness Strategy and Action Plan.
Has this plan resulted in any action?
There's the usual collection of overly dramatic news reports about this branch of NASA finding and tracking near-misses:
express.co.uk reports a tracked object that came within 0.03860 AU. It's not clear when NASA first detected it.
USAToday for a simulation drill that was run in mid-2019,
as a tabletop exercise Monday-Friday at the 2019 Planetary Defense Conference in College Park, Maryland
Closer to reality:
A NASA update briefing with lots of colorful charts. Some examples:

So not only are tracking methods and capabilities being upgraded, but long-range planning and design of possible deflector systems continue. Bruce Willis approves.