On my old installation of tt-rss server I had a plugin af_fullpost and another one embed_original to help me to pull in text from certain problematic RSS feeds.
None of the two exist for the updated tt-rss server I have now transitioned to and I do not seem to find any replacement plugins.
Have I missed something?
af_readability will attempt to fetch full content. It can be set to do this for all articles in a feed, or only those matching certain filter rules. You can also try feediron or something similar if you need more control over.
As for embed_original, please see this thread:
https://community.tt-rss.org/t/embed-original-is-still-available/3267