Swarm of bright objects moving through space

On September 3, 2021, the live cam of the International Space Station captured a series of unknown bright objects moving through space. 

The moving objects are not city lights as they were seen from ISS when the ISS was above the ocean between South Sandwich Islands and South Africa. 

They all follow a fixed trajectory and fly at different speeds, it seems most of them come from one location. 

On July 6, 2021 a similar event took place when the ISS live feed captured hundreds of unknown bright objects moving through space. 

Since the most of these unknown lights captured on July 6, 2021 as well as on September 3, 2021 are following the same path we may wonder whether they all come from the same unknown source in space.