Extruding in Photoshop for ipad

@Affinity Inspiration 

The 3D features were removed in the desktop version and have never been in the iPad version. You posted to Ideas, so Adobe staff will see it.
My personal opinion is that it won't happen.

You can extrude in Illustrator for desktop: Effect menu > 3D and Materials > 3D (Classic) > Extrude & Bevel (Classic)

https://helpx.adobe.com/illustrator/desktop/special-effects-styles/create-3d-graphics/create-3d-objects.html

It appears that you can also extrude in Adobe Substance 3D Designer for desktop, although I have never used it:

https://helpx.adobe.com/substance-3d-designer/substance-compositing-graphs/nodes-reference-for-substance-compositing-graphs/node-library/texture-generators/patterns/shape-extrude.html

As to your question about a Bayer-Ordered Dithering filter, you posted about this on December 19 and staff asked for details on the same day, which you never answered. Please continue that conversation in your original post:

https://community.adobe.com/t5/photoshop-ecosystem-ideas/bayer-ordered-dithering-in-photoshop/idi-p/15638668

Jane