In our ISO 27001 package is there a document template for a Security Risk Management Plan? or is this covered in 05_Risk_Assessment_and_Risk_Treatment? I couldn't see the document for a plan only assessment and methodology.
I’m assuming that by “Security Risk Management Plan” you mean for planning how to implement risk treatment.
Considering that, in your toolkit, there is a Risk Treatment Plan template where you can define what needs to be done to implement risk treatment. You can find this template in folder 07 Implementation Plan.