Invoice Prep not capturing expenses in E10

Good day everyone. We’re in the process of upgrading to E10 from E9 and are currently testing the basic processes. Everything seems to be working fine until we got stuck in Expenses. We’re able to submit expenses to a project and approve but the Project Invoice Preparation process is not capturing the approved expenses. We’ve done the usual steps that we do in E9 but it doesn’t seem to be working.

Is there any setting in E10 for expenses that we need to look at or set so expenses are captured in Invoice Prep?

Many thanks in advance for any help.