Cars I extracted after I completed the extract in Lockdown mode doesn't appear

Dear EA Team,

I wanna ask about the new game mode "Lockdown", I already played this mode like 4 times but after I completed the extract the cars or bike doesn't appear in garage, in online garage or single player garage. Can you give me explanation abot this, because I really confuse why the cars I extracted doesn't appear in garage ?

Thank you,