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@refined-pilot-45584 you need to use the

BackendArrayInput{}

type, which will allow you to append to an array:

var iTypes = pulumi.StringArray{}
iTypes = append(iTypes, pulumi.String("t3.medium"))

Thanks for the pointer again; I must admit I feel kind of stupid on this one. But I am not certain I follow the approach. I am attempting to solve in the following way.

var BackendServiceBackendArray = &compute.BackendServiceBackendArray{}
		// LOOP START
			// DYNAMIC STUFF Create new Array Item

			newItem := &compute.BackendServiceBackendArrayInput{
				&compute.BackendServiceBackendArgs{ 
					// CONTENT
				},
			}

			// Append Item to Existing Array
			BackendServiceBackendArray = append(BackendServiceBackendArray, NewItem)
		// END LOOP

I am not 100% sure if I am using the BackendArrayInput type in the correct location here;

can you share your full code, so I can recreate and fix?

I can. Standby.