I had a contractor working with this PPE on a switchgear, can you help me to point out what's wrong here ?

Is the equipment labeled with a current IE value or PPE level and has the equipment been maintained?

Nice, can I get a quote on this 40 cal Jeans and sweatshirt? Seems more comfortable than the usual suit
Also those test leads dont seem like they are Cat. IV

Without knowing the available incident energy you cannot say anything is wrong.

I know plenty of people, including myself, that prefer to put my whole "Cat 4" hood on rather than wear a balaclava. Also having to carry another face shield with a lower rating on an airplane when I travel is a pain. Jeans and sweatshirt are readily available up to "10 cal".

It's a bit hard to read because it's so small but I think the label in the first picture says 34.6 cal/cm²

Which may be true for the line/load lug compartment at the back of this switchgear. however, it may not be applicable to a low voltage/instrument compartment where the worker is.

Just not enough data to say the picture shows a dangerous activity.