Foreign Objects Discovered In Some Boeing 737 Max Fuel Tanks

Foreign objects were found in some Boeing 737 Max planes stored in Washington and San Antonio. These findings are unrelated to the previous crashes that led to the grounding of the planes. Boeing has initiated inspections of over 400 planes and is implementing new processes to prevent foreign object debris (FOD). The FAA is aware and has increased its surveillance based on initial reports.

What is the significance of the findings related to the two crashes that killed 346 people?

What measures is the FAA taking in response to the issue of foreign objects in the fuel tanks?