Toggles break imported content; let > as a Markdown symbol

Currently I can’t import any content from other apps (Craft, Notion, Obsidian, etc) because Toggles and Toggle Headings not only aren’t recognized but also break the content completely (they render as code blocks). It’d be one thing if the toggles weren’t rendered & they just formatted as regular headings or bullet lists, but they don’t. I’m having a really hard time migrating between apps because of this.