Heatmap? Contour plot? with (X,Y,Z) data with Z for coloring in python

Question

I have 3D data (X, Y, Z) and I want to use Z as coloring on 2D map or just make a 3d surface plot.

my data looks like this but much more data points.

X = [0.2, -1.78, -3.82, -1.34]
Y = [9.18, 9.87, 7.75, 9.38]
Z = [6.85, 7.51, 7.32, 6.98]
df_qp = pd.DataFrame(list(zip(X,Y,Z)), columns = ['PC1', 'PC2', 'QP'])

I tried with 'scatter plot' like the figures below,

But, I want to visualize my data like this, Can someone help me solve this problem? Thanks.