Video "Mute" doesn't consistently work on Figma Sites

When setting a video as a background of a frame in Figma Sites and checking the “Mute” toggle, the HTML video tag does not have the muted property.

My goal is to autoplay the video. Autoplay works in some browsers (even though the “muted” property is not on the video tag), but in others (such as mobile Safari), the muted property (and others that are sometimes required, such as playsinline and webkit-playsinline) are not included in the HTML.

Without the required properties, the Autoplay toggle is useless when the Figma Site is viewed in some browsers.