Why is my embed working when I see preview in the editor but not when I view site live ?

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<iframe width=”100%” height=”640″ frameborder=”0″ allow=”xr-spatial-tracking; gyroscope; accelerometer” allowfullscreen scrolling=”no” src=”https://kuula.co/share/collection/7F5QF?logo=1&info=1&fs=1&vr=0&sd=1&thumbs=1″></iframe> For context this is the custom HTML I am trying to embed

[https://kuula.co/post/n1/collection/7F5QF](https://kuula.co/post/n1/collection/7F5QF) – actual webpage

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