If you want to understand webmentions in WordPress, might this be a good starting point for you? https://boffosocko.com/2017/12/15/threaded-replies-with-webmentions-in-wordpress/
Uh-oh. Keyboard envy ...
Maybe it's just me, @kewgardens, but I would have expected an article about interesting lettuces with lots of photos to at least tell me the names of the varieties pictured. https://www.kew.org/read-and-watch/lettuce-season-kew-kitchen-garden
Just published the latest Eat This Newsletter at https://www.eatthispodcast.com/eat-this-newsletter-104/ and need to test this new Twitter plugin too.
So here goes.
Just upgraded my WithKnown site to the latest master. Slightly hair raising, but excellent help from @mapkyca got me over the hurdles. Only downside, currently, seems to be the plugin that syndicates to Twitter.