Minecraft 1.16.5
portabletanks-1.1.2-mc1.16

The mechanical crafting jei page of Create mod will broken when this mod is installed.

It is fixed now in Portable Tanks 1.1.3.

Thank you for reporting the issue!

There doesn't appear to be a page for mechanical crafting as the mechanical crafter just uses normal recipes. What page are you referring to?

The recipe for the mechanical crafter appears as normal.

All the tabs in JEI also appear as normal, however there's none for mechanical crafting.

Nevermind, I get what you mean now. Your point is that the tab doesn't appear.
I fixed it with ffda590.

@Dremoline will likely include in the next update.