Thank you for your question.
To answer your question unfortunately at the moment we do not offer the source option to pull and display posts from Facebook hashtags due to Facebook API limitations.
As a workaround, you can re-post the desired hashtag posts from your Facebook page so you can display them with your other Facebook page posts.
If you have any questions, click the bottom right chat icon to talk with our customer success team or send us an email at support@embedsocial.com
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