Has Togata Lost His Quirk?

Initially, he struggled with his Quirk but after training with Sir Nighteye did he manage to perfect it. Mirio lost his Quirk after his fight against Overhaul, during which he was struck by a bullet containing the Quirk-Destroying Drug, taking the bullet in Eri's place.

Did Mirio lose quirk forever?

Mirio is back in action with his quirk back in top shape. ... After all, Mirio lost his quirk during his final fight with Overhaul as he was hit by a Quirk Erasing bullet. The hero, who also goes by Lemillion, sacrificed his power in order to save Eri. But now, well - it seems he is back in working order!

Does Mirio get his quirk back?

Mirio Togata, aka Lemillion, gets his quirk back after a long 6 months hiatus and returns to the frontlines to save a million lives, as promised! Eri manages to use her quirk “Rewind” to bring Lemillion's Permeation quirk back in Chapter 292 of My Hero Academia. 1.