Standard Notes says its server holds your notes' metadata but cannot read their content, and states three separate times that it cannot decrypt what you write.
“While our server stores metadata like creation and modification dates, it cannot read the content of your notes.”
Paste this where the card should sit. It is the live verdict: if the grade changes, the card changes. It loads nothing from anywhere but this site and sets no cookie.
Editors that support oEmbed (WordPress, Ghost, Substack and most newsroom systems) can paste the entry's address instead, https://isittrainingonme.com/app/standard-notes/, and get the same card.