you can do it yourself here:
https://developers.facebook.com/docs/plugins/page-plugin - all you need is the address of your page in facebook.
Cloudflare outage is affecting access to SOME Shopify Sites from Some locations.At approx. 5pm on 21/6/22 there was a Cloudflare outage. Cloudflare provides a performance/security layer for Shopify and many other websites.
UPDATE: here is Cloudflare’s incident report: