However, in Studio I cannot find any activity to let me trigger the process using this connection. I know there is a way to do this somehow, as I’ve done it previously in a test-project (below)
However, in my current project, I have no ability to add a Webhook Event Happened activity in the project, nor can I add the UiPath.HttpWebhook.IntehrationService.Activites dependency.
You’ll need to create the project as a trigger-based one attended or background, depending on the use case, otherwise webhook activities won’t show up. Also double-check that Studio is connected to the same Orchestrator tenant where the webhook is created. In Manage Packages, make sure both Official and Preview feeds are enabled and then search again. If this is an existing process project, it can’t be converted — you’ll have to recreate it with the correct trigger-based template and move your workflows into it.