I have a div block with a class “help-image” that contains an <img>, inside a section with a class “help-section”.

Using the :has selector as follows works fine:

section.help-section > div:has(img),
section.help-section > div:has(figure),
section.help-section > div:has(button)
{
    background: mistyrose;
}

However, passing a list of elements (as the MDN docs suggest I can) doesn’t work at all:

section.help-section > div:has(img, button, figure)
{
    background: mistyrose;
}

I have inspected all elements with the developer tools, and the rule does not appear at all if I use the second example.