Glad to have you back here in the Community, @amper.

Let me provide some clarifications regarding the link that was shared by my peer RoseMarjorieA above.

The link was presented by RoseMarjorieA was about managing Projects in QuickBooks Online. This talks about how the feature works in the. Please check out this link to learn more about the said functionality: Learn more about Projects in QuickBooks Online.

On the other hand, if you're still experiencing the issue wherein expense transactions are not showing in the Project overview, I suggest reaching out to our Customer Care Team. They have the tools that can help investigate and identify the root cause of this matter and apply a resolution.

To contact them, please follow the steps outlined by my colleagues above.

Keep me posted on how things turn out. My doors are always open to help if there's anything else that you need. Take care!