Did Asta lose the Demon-Dweller Sword permanently? According to the Black Clover wikia,


    During his fight with Asta and Yuno, Licht reclaims the Demon-Dweller Sword[70] and displays greater control over the sword's magic absorption and release property.


Did Asta lose the Demon-Dweller Sword permanently?
No he didn't. Even though we don't see licht giving it back to him, Asta later in the show and manga uses it.