Exclude block from ActivityPub

Is there a way to exclude parts of a blog post from the ActivityPub/Mastodon content?

For example, I have these blocks in a post, and they only make sense on the website: https://drive.google.com/file/d/1CVoLDgXmhbtqWmycBGVOZgL61_9oc39H/view?usp=drive_link (link to an image on Google Drive since this support forum doesn’t support embedding images??)

On the website they render correctly: https://drive.google.com/file/d/1CZTbe6l6cUu_NedpwG2Hu_UDe1wm_eHp/view?usp=drive_link

But on Mastodon I just get the fallback content: https://drive.google.com/file/d/1CaHthkK3yDBPNkbhyUEuBJ-E3VwpwVHa/view?usp=drive_link

If there isn’t already, can we get a way to mark certain blocks in the WordPress blog as excluded-from-ActivityPub so we can tailor the content for federated platforms?