Zoro's got the rest of Wano (and the series) to interact with the Strawhats. He's also done it for the last nine hundred chapters.
Zoro's relationship with the people of Wano is simply more important for this arc than him... what, exactly? What do people actually want from Zoro? What does "interactions with the Strawhats" actually mean? He spent the first ten odd chapters messing around with Luffy. Does that not count? He met up with Brook then we had the Strawhats vs Shogunate scene. Not enough for people? And last we saw of him he's back together with the crew. Him doing the wandering swordsman trope and actually setting up a plot for himself- unlike the rest of the Strawhats bar Luffy- has been a welcome change for me.