Embedding PPT requires Sharepoint login

RacquelW 

in my case, I have to add a ? sign after the link in the iframe.

e.g.
public file link access:
https://my.sharepoint.com/:w:/g/personal/username/ERutomz36ppKkB4xAR8-QVUBK_-uAQxD5vb2R1yjwlzaPg

get embedded link:
<iframe src="https://my.sharepoint.com/personal/username/_layouts/15/Doc.aspx?sourcedoc={6ca2ad1b-eaf7-4a9a-901e-31011f3e4155}&amp;action=embedview" width="476px" height="288px" frameborder="0">This is an embedded <a target="_blank" href="https://office.com">Microsoft Office</a> document, powered by <a target="_blank" href="https://office.com/webapps">Office</a>.</iframe>

Final working link using public link, with ? mark before &amp;action=embedview" :

src="https://my.sharepoint.com/:w:/g/personal/username/ERutomz36ppKkB4xAR8-QVUBK_-uAQxD5vb2R1yjwlzaPg?&amp;action=embedview" width="476px" height="288px" frameborder="0">This is an embedded <a target="_blank" href="https://office.com">Microsoft Office</a> document, powered by <a target="_blank" href="https://office.com/webapps">Office</a>.</iframe>

Guide: https://edumoebn-my.sharepoint.com/:b:/g/personal/rasyiqah_rahgeni_teacher_smmasin_edu_moe_bn/ETK1xgN3D6BIrKaPAxoazPQBhNpO0bdL2pKVgV1d3e5nPA?e=Vd0y3z