According to the app's developer, Apple Support hasn't been forthcoming about why its notarization might have been revoked.

Apple revoked the iTorrent developer’s EU distribution rights, pulling the torrent client from AltStore PAL and raising questions about iOS 17.4 notarization and DMA goals.

Apple has removed the iPhone torrenting client, iTorrent, from AltStore PAL’s alternative iOS marketplace in the EU, showing ...