@jtgi
“How can I check if a cast has propagated?”
In automod you can check the Activity log. If you want protocol specifics check out this explorer from @kevinoconnell explorer.neynar.com.
I’ll build simpler ways in automod to see this happening as well.
“Where can I learn more about network propagation?”
See this paragraph article from Neynar for an overview: https://blog.neynar.com/understanding-message-propagation-on-farcaster-mainnet
“Are others impacted by this?”
Yes. Any infra and apps building on Farcaster.