Hi Vanessa,
thanks for sharing! I have exactly the same problem - no option to create agent in web app, also no option to add existing agent in Agentspace AI Application configuration, Assist tab. Everything worked in Qwiklabs, but in real deployment there is simply no option to add agents.
In my setup project belongs to organization, and has linked a billing account, Enterprise Plus Agentspace 30 days trial license. Agentspace application with some data stores configured (Workspace integration mainly) is deployed in EU region with Google Identity provider. I deployed with Global region, got same result of no custom agents available.
I could not find any information in the documentation either. Any help highly appreciated! I got stuck with Agentspace demo project because of that issue.
Attaching screenshots of Agentspace webapp and app configuration where custom agents configuration should be possible.
