No info in the public domain for any. However, if I were to hazard a guess, I would say F21. Obviously there is also the 🇩🇪 DM2A4 for another electric powered heavyweight torpedo, while the rest such as the 🇺🇸 Mk48, 🇬🇧Spearfish, 🇰🇷White Shark, and 🇯🇵Type 89 are using Otto fuel II
Also, need to...