I noticed that my weekly report lists different projects than my colleague’s. Why is this, and how can I view the projects that are missing from my weekly reports?

The weekly report is designed to be user-specific, showing statistics only for projects associated with the teams you belong to. If you're missing projects in your weekly report, it's likely because you're not a member of the team(s) those projects belong to.

To see specific projects in your weekly report, join a team that the project belongs to.