If I delete project in ActivityTimeline, will it affect Jira?

No, If you disable a project in ActivityTimeline it will still be available in Jira. You can make project unavailable in ActivityTimeline in ActivityTimeline Configuration->Projects-> Uncheck the box ‘Is Active’:

Can I create projects directly in ActivityTimeline?

No, all projects must be created in Jira and synced to ActivityTimeline.

If you have any additional questions related to the following section, please don’t hesitate to contact our team at: support@reliex.com.