Java Edition doesn't show my username, but Bedrock Edition does.

Thank you for your report!

However, this issue is Working as Intended.

Both Minecraft Dungeons and Minecraft for Windows games pages are connected to your logged in Microsoft account, while your Java is not. Once you obtain Java you will have to name your Java account and it will be visible on your Java 'Play' page.

Quick Links:

📓 Bug Tracker Guidelines – 📧 Mojang Support

📓 Project Summary – ✍️ Feedback and Suggestions – 📖 Game Wiki