The full detail about every ship of the FWL navy has not been detailed.
The WoB captured several of the ships, destroying others in naval battles over Atreus and other places. Most of these have been destroyed by 3079.
Regulus and Oriente both had several ships join their sides, but have both been reduced in various actions.
Some ships were simply never finished (like the FWLS Thessaly).
Information about some of the actions can be found in several of the "Jihad HotSpots" books, "Jihad Turning Points: Atreus" (espesially the BattleCorps-exclusive AeroSpace track), "Field Report: FWLM".
With regards,
Øystein