Why is a wordpress site shown as responsive in the panel, but in fact it is not?

Question

Adaptive design

If you go to the site through the phone, the width of the site breaks. If you look through the admin panel, it shows that everything is OK, and the site is adaptive. Where exactly could be the problem? wp-admin
resource : phone:

Answer 1

and you poke more plugins and you will be happy
different resolutions, different browsers