Earth like planets

In my eyes radiation and tides are not much an issue.

When planets cause tidal forces to other planets then they are either pretty big or so close that they even disturb the orbits,
Especially with such many planets being so close together on low orbit around the sun the orbiting speed of the planet should be pretty fast. Fast enough for them to frequently light up and cause additional gravitatoinal pulls on each other.
Since they seem to keep a stable orbit instead of getting pushed out of the system i wouldnt be worried that much about tides.
But I could be wrong with that.

In terms of radiation I would say that there is alot of guessing.
The star is smaller and colder.
The light spectrum goes bit more into the infrared direction... which isnt bad at all. Long wavelengths dont cause radiation damage.

Chlorophyll-f is able to absorb infrared light here on earth. The development of such a photosynthesis on other planets which orbit small stars might be possible.
Plants probably would have a different color on such planets due to the missing light spectrum.

The only thing that really is a problem is the distance.
We wont be able to fly there to see if there is life.
But these planets are also not too far away to observe them and catch indicators that tell us if life is actually possible there. New telescopes might allow us to check for bio markers.
If detected such bio markers would be first proof of life outside our solar system and it would render this star system a potential "last-option" candidate in case that something might destroy earth.