Something seems off with the wordpress.com ActivityPub integration. When I (and others) check my blog profile (@blog.troed.se) on Mastodon, while it displays, there's also a brief error 500 popping up. That seems to then mean that it's not possible to read/comment on the blog.
The FediFetcher script also reports errors when trying to fetch posts from the wordpress.com profiles:
2023-10-12 10:41:04.089201 CEST: Error getting host node info for public-api.wordpress.com. Status Code: 404
2023-10-12 10:41:04.089245 CEST: server blog.troed.se not found for post
2023-10-12 10:41:02.320425 CEST: Error getting host node info for public-api.wordpress.com. Status Code: 404
2023-10-12 10:41:02.320470 CEST: server pfefferle.wordpress.com not found for post
ping @pfefferle