Hey, Dean. Thx for the update (RDOi v10.3 on IBM i).
My previous screenshots were from our DevOps portal (RDOp) and were for RDOi deployment sets...
Links below to the documentation on the process, but the status of the set (and a few other settings) will determine if a set is 'eligible' for Backout option.
If the Deployment Profile has the option enabled to 'archive' the replaced objects during deployment (e.g. 'save last 10 sets for backout archive'. You can control the number of deployments eligible for backout with the Number of deployments to archive setting for the Deployment profile) and the set was installed successfully (and the user has authority to manage deployments), the Backout option should be enabled for a completed/installed set.
More here on the feature in the documentation Deployment Reference.
Please let us know if/how we may assist you further.
Best,
Dale