Q: What does a status change from "Under review" to "Under editor evaluation" mean?

As you have mentioned, the status of your manuscript was "Under review" for 2 months and then changed to "Under editor evaluation." This is quite normal and it usually means that the reports from the peer reviewers have been received and the editor of the journal is assessing the reports, prior to arriving at a decision on the submitted manuscript.

I'm not sure which similar case you are referring to in your question. It would have been easier to understand if you had posted your question as a comment rather than as a separate question.

Suggested reading:

• Peer review process and editorial decision making at journals
• The peer review process: challenges and progress
• What to do if the review process is delayed and the editor is unresponsive?