The timing of the Wano Arc's end in the manga is uncertain. It could be within the next few chapters or it might stretch on a bit longer. The story has many twists and turns that could influence the conclusion.
Luffy uses Gear 5 in a significant battle towards the later part of the manga. But the exact chapter or arc can vary depending on how you're reading it.
The Wano Arc has indeed come to an end. It was a long and action-packed arc with many memorable moments and plot twists. The conclusion wrapped up various storylines and set the stage for new adventures.