↳ In-reply-to » The original twt is unavailable. It may have been edited or deleted, or is from an unknown or muted feed.

See:

Message-Id: <hns535a@twtxt>
X-twtxt-feed-url: https://darch.dk/twtxt.txt
In-Reply-To: <pvju5cq@twtxt>

And

Message-Id: <weadxga@twtxt>
X-twtxt-feed-url: http://darch.dk/twtxt.txt
In-Reply-To: <pvju5cq@twtxt>

Two feed URLs, one HTTPS, the other HTTP.