Adaptability does not switch on phones, where to dig?

Question

Media queries

Here is the patient https://www.edc4u.info/ on the site, adaptive layout is used, when the browser size is changed, everything works well, it switches to mobile display, when viewed through smart, a standard page is displayed. Tell me where to dig? it's on the site:

<meta name="viewport" content="width=device-width,initial-scale=1,maximum-scale=1,user-scalable=no">

Answer 1

probably deal with

<meta name="viewport" content="width=device-width, initial-scale=1">

Answer 2

tried
and
does not work