How can I make my Facebook embeds responsive?

I'm trying to embed a bunch of Facebook posts onto my Squarespace page to make a curated Social media feed.

It works fine on Desktop view, but on mobile view the Facebook posts aren't responsive. Twitter posts are lovely and responsive so I'm not sure what I'm doing wrong.

Can anyone suggest anything? Here is the page (under the title 'We don't care about mobiles option'!): https://malachi-chadwick-vsy2.squarespace.com/config#/|/itshappening

It looks like these Facebook embeds are meant to work in mobile as well:

https://developers.facebook.com/docs/plugins/embedded-posts

(Under Layout on Mobile Web)

I'd reach out to Facebook and see if they have a solution.

An additional note - if you aren't already, I recommend using the Code Block for these embeds. This might help with responsiveness.