The standard klingon uniform is something that is produced for dozens of people to work on set. It must have been created very early n production, when they clearly weren't that good or experienced with that stuff.
The "armor" is completely CGI on the show. What is shown is a 3d-printed and painted object, that never has to be worn by anybody or be able to move. That was done when they already knew what they were doing, and where they could fiddle with the details until just right before they have to show it.