Parameters in web request not working

I try to use parameters in my web request and it’s don’t working
Only work in parameters for URL
No working in Header, Body

This works good, but when I try it in another section no work.
May be I need to create it by script, I try, but I want that this works fine here
And please do something with cyrrilic, it’s not recognized. Postman works with it

are you also sending parameter when you call this service?
can you share how your call looks like?

Yes, I doing this

what i ment was how it looks here:

it’s working normal here, not working within request, i can’t use variable in http header and body, when i use variables in request it’s working normal, i think this is bug