(Parity):Not being able to place stuff on trapdoors like ladders or rails

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

Going forward we're going to be tracking parity issues and feature requests on the Minecraft Feedback Site, and we'll be tracking bugs here at bugs.mojang.com.

We're already working on achieving parity across versions where possible, and we're very keen to hear your requests or suggestions, so we'd encourage you to make a post at https://feedback.minecraft.net, or upvote an existing topic there.

If you're not sure whether your issue is a parity request or a bug, hopefully this article will help explain further: Parity Request Guide

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

Is there a request for this on the Minecraft Feedback Site?

If so I would like to support the idea!