How to force responsive iframe target to respect viewport of iframe and behave responsively as if it were being accessed directly?

The following site is fully responsive when accessed directly: https://prosolutionplus.com/ However, when accessed through an iframe, its responsiveness misbehaves and does not conform to the width of the browser: iframe { display: block; /* iframes are inline by default */ border: none; /* Reset default border */ height: 100vh; /* Viewport-relative units */ width: 100vw;…

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