afaik nostrudel is client-side only (i.e. doesn't operate a backend)
SSR (necessary to generate link previews) is very hard and imposes a large cost on developers
nostrudel's viewer does not support open graph for the induvidual note. So there will be no link preview. Please compare:
cc nostr:npub1ye5ptcxfyyxl5vjvdjar2ua3f0hynkjzpx552mu5snj3qmx5pzjscpknpr
afaik nostrudel is client-side only (i.e. doesn't operate a backend)
SSR (necessary to generate link previews) is very hard and imposes a large cost on developers
tl;dr
feature not a bug