two chicken coops enough for 6 chickens?

[Sefirothe]

Along with adding clutter in the run, which you’re doing, consider adding vertical stuff - branches, 2x4’s, perches off the ground. Chickens are descended from jungle (meaning tropical forest) fowl. They love going up!

Yep, I have an old fruit crate and small wood wire spool they can jump on. Plus a corner roost that’s a big favorite.

 

[Bawkbok]

More run space will be important. If you haven't purchased the additional two chickens yet, stick with the four and see how it works, but you will need to add more ventilation to the TSC prefab (all prefabs have inadequate ventilation) in addition to adding a lot more run space and more items for them to perch on, run around, sit on.
Welcome to BYC and congratulations on joining the chicken journey.