Hi Ofi,
Not quite sure what you mean. Do you mean that you don't have the same issue? Or is it not clear to you what the issue is?
O wait: I see the line I copied is removed from my answer.
Look in the head section of the site and you will see the link href to Google fonts, in this line you can see that the weight 600 isn't loaded although this is specified in the template settings, hence, it is written in the css too, as you can see in the screendump you made. But because this font is not available, the browser will make it a 700 weight.
family=Poppins:100,100i,300,300i,400,400i,500,500i,700,700i,900,900i&display=swap&subset=latin" rel="stylesheet" (stripped line in the head of the site)
Clear to you?