I imported a 3D tikzplot figure in Latex and it is extremely small

I created an easy 3D figure in Python using this code:

import numpy as np
import matplotlib.pyplot as plt
import tikzplotlib

XX = np.array([0,1,2])
YY = np.array([0,1,2])
XX, YY = np.meshgrid(XX, YY)
ZZ = np.sqrt(XX**2 + YY**2)

plt.figure(10)
ax = plt.axes(projection='3d')
ax.plot_surface(XX, YY, ZZ)
plt.show()

tikzplotlib.clean_figure()
tikzplotlib.save("myfig.tex")

Then, I imported the file in a document like this :

documentclass{report}

usepackage{tikz}
usepackage{pgfplots}

begin{document}

Hello

input{myfig.tex}

Where is my figure?

end{document}

The result is a very tiny figure :

I tried adding height=5cm, width=5cm, in the myfig.tex file, but this does not help.

I do not understand where the problem could lie…