When I use name tags I cannot see them

You need to look at the mob, (e'g focus you're cursor on it)
Named mobs will not show their nametags like a player on a server.

Thank you for your report!
However, this issue has been closed as Incomplete.

Your report does not contain enough information. As such, we're unable to understand or reproduce the problem.
If your ticket does not look like the example given here, then it's likely to be closed as incomplete.

Quick Links:
📓 Issue Guidelines – 💬 Community Support – 📧 Feedback – 📖 Game Wiki