How to create a Bottlerocket Nodegroup in EKS with full working logic

Iam confused about the Bottlerocket AMI. The sense of Bottlerocket is to have a data snapshot with preloaded data. This i was successful created. But now I have an issue with the usage. 1.) If I create a new Nodegroup inside my cluster with the AMI Bottlerocket then I have not the choice to set the volumens. The Bottlerocket AMI from the Nodegroup creation has only one volume without any snapshot. If I change the template and add the volume with the snapshot I want to use with this Bottlerocket, the nodegroup get degraded. 2.) Changing the Launchtemplate insiide this created Nodegroup the Launchtemplet get reset to the default one. 3.) Creating a Launchtemplate for my Node choice (Bottlerocket AMI, NodeType, Volumes) and use this Launchtemplate with creating a new Nodegroup inside my cluster will cause a "Creation failed" in the nodegroup view.

So please, how I can create a Bottlerock Nodegroup with use of two volumes as an eks nodegroup?