No spawn egg for drowned in the inventory

They should be between the husk and the squid spawn egg?

Did you enable the "Experimental gameplay" option in the settings when creating the world?

Yes

Are you playing on a multiplayer world?

No

Thank you for your report!
However, this issue has been closed as Cannot Reproduce.

We were unable to reproduce the problem you are describing in the latest version.

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