I am trying to plot a data on 2 y-axis by using twinx().
The issue is that the legend on the axis – twinx() is not getting displayed.

the code used for expected result is as below:

df_plot = DF02.query('Make == "Acura"')
Fig = plt.figure()
ax1 = Fig.add_axes([0, 0, 1, 1])
ax2 = ax1.twinx()

# Drawing a line plot
sns.lineplot(data = df_plot,
             x = 'Year',
             y = 'highway MPG',
             hue = 'Model',
             palette = 'rocket',
             style = 'Model',
             markers = True,
             dashes = False,
             ax = ax1)

# Drawing line plot on ax2 using matplotlib
ax2.plot(df_plot['Year'],
         df_plot['avg highway MPG'],
         marker = '*',
         label = 'avg highway MPG')

# Set x-axis and y-axis ticks
xticks = np.arange(1990, 2021, 2)
ax1.set_xticks(xticks)

yticks = np.arange(10, 41, 2)
ax1.set_yticks(yticks)

ax2.set_yticks(yticks)
ax2.axes.get_yaxis().set_visible(False)

# Change name of plot title
ax1.set_title("Line Plot in Seaborn", fontdict = {'weight': 'bold'})

# Change x and y axis titles
ax1.set_xlabel('Year')
ax1.set_ylabel('Highway Fuel Economy [MPG]')

# Placing the legend
ax1.legend(title = "Vehicle Modeln", loc = 'center right', bbox_to_anchor = (1.3, 0.5))
ax2.legend(title = 'Legend', loc = 'upper right', bbox_to_anchor = (1, 1))

# Enabling the grid
ax1.grid(ls = '--', color = 'lightgrey')

However when plotted using seaborn, the legend does not appear as expected.

Code used in actual result is as below:

df_plot = DF02.query('Make == "Acura"')
Fig = plt.figure()
ax1 = Fig.add_axes([0, 0, 1, 1])
ax2 = ax1.twinx()

# Drawing a line plot
sns.lineplot(data = df_plot,
             x = 'Year',
             y = 'highway MPG',
             hue = 'Model',
             palette = 'rocket',
             style = 'Model',
             markers = True,
             dashes = False,
             ax = ax1)

sns.lineplot(data = df_plot,
             x = 'Year',
             y = 'avg highway MPG',
             ax = ax2)

# Set x-axis and y-axis ticks
xticks = np.arange(1990, 2021, 2)
ax1.set_xticks(xticks)

yticks = np.arange(10, 41, 2)
ax1.set_yticks(yticks)

ax2.set_yticks(yticks)
ax2.axes.get_yaxis().set_visible(False)

# Change name of plot title
ax1.set_title("Line Plot in Seaborn", fontdict = {'weight': 'bold'})

# Change x and y axis titles
ax1.set_xlabel('Year')
ax1.set_ylabel('Highway Fuel Economy [MPG]')

# Placing the legend
ax1.legend(title = "Vehicle Modeln", loc = 'center right', bbox_to_anchor = (1.3, 0.5))
ax2.legend(loc = 'upper right', bbox_to_anchor = (1, 1))

# Enabling the grid
ax1.grid(ls = '--', color = 'lightgrey')

Can anyone please suggest how to get the result similar to expected result by using seaborn on both axes ax1 and ax2?