2019 scat

Does the dark around the injectors I assume mean the the gasket is failing or something? I’m not a professional but I also don’t know what this dark/carbon looking stuff is that’s forming on the engine block. 2019 Scatpack with 21k miles.

I’m currently riding stock but was wanting to upgrade to some coil overs heard it’ll improve with bounce. Wouldn’t really want to lower it more it scrapes as is enough already but I do want to improve the over all ride quality any suggestions/comments??