That is unfortunately expected behavior. When using the NSX-T integration, you can only select local manager objects. You cannot select objects created at the GM level and pushed to the LMs.
Just to add on top of @jeffersonc47 words - you will receive Basic license tier with NSX-T key with multiple limitations in place. More on https://avinetworks.com/docs/22.1/nsx-alb-basic-edition/#feature-comparison-datasheets
At the very beginning you will have just 2 clouds mode - without Orchestrator or NSX cloud connector.