Arviz won't apply to matplotlib ax (plot_forest, plot_kde)

What happens when you run

fig, (ax1, ax2, ax3) = plt.subplots(1, 3, figsize=(18, 5))
x = np.linspace(0, 1)
y = np.random.normal(loc=x)

ax1.plot(x, y)
ax2.plot(x, y)
ax3.plot(x, y)