Why might the favicon not be displayed?

Question

HTML

When you open the site, the favicon is visible from above, but on mobile phones, in Yandex, the favicon is not visible, what could be the problem?

On the way, the picture is available, the cache was updated. The only thing is that I connected the site to Yandex WebMaster and Google Search Console, could it be that the robot somehow did not index my favicon?
Here is the code for displaying the favicon:

<link rel="apple-touch-icon" sizes="180x180" href="./img/pc.svg">
    <link rel="icon" type="image/png" sizes="32x32" href="./img/pc.svg">
    <link rel="icon" type="image/png" sizes="16x16" href="./img/pc.svg">
    <link rel="mask-icon" href="./img/logo.png" color="#5bbad5">

Answer 1

Perhaps Yandex did not index your favicon

Answer 2

Yandex svg does not display favicons