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Suggestion required for Facebook iframe feed provided in a web page

for

From: Mohith BP
Date: Sep 10, 2020 2:22AM

Hi Team,

One of the sites is using the iframe and loading the Facebook posts dynamically.
The iframe is in the main region of the home page and there is content
after and before the iframe.
Issues Found:
1. Elements to like, comment and play video are not labelled. At times
NVDA just reads button.
2. Tab navigation: it is infinite scrolling as it is a feed and older
posts gets continuously loaded.

Queries:
1. As it is an external content what is the requirement of WCAG
conformance? Developer states there is no control over the data as it
is loaded from Facebook.
2. What is the best keyboard mechanism can be implemented here?
3. Is "3.11 Feed" pattern from ARIA Authoring document good?

Thanks & Regards,
Mohith B. P.