To add a Facebook Page Feed to Ghost Blog, you can use these options.
#Option 1. Use Facebook Page Plugin
#1. Go to Facebook Page Plugin page:
https://developers.facebook.com/docs/plugins/page-plugin/
#2. Paste the URL in Facebook Page URL and customize the settings
#3. Click Get Code
#4. Click Iframe
#5. Copy the Iframe code
#6. In Ghost Blog, click the post you want to add Facebook Post
#7. Click where you want to add Facebook Page Feed and Enter
#8. Click + symbol
#9. Click HTML
#10. Paste the copied code into the box and click Preview to see the result
#11. Result
#Option 2. Use 3rd party tool (free tool)
#1. Access this free tool, choose a desired layout and click Continue with this template.
#2. Connect Facebook, adjust layout if you want then click Add to website for free.
#3. Click Publish on top right
#4. Choose Free Plan & Copy Embed code
#5. Use HTML feature in Ghost Blog
and paste your embed code
#6. Result