the interactive controls of matplotlib figure are not visible due to some issue in the default theme. It is clearly visible in the kde version.
not able to include image in the post
That means is using the Qt decorations so you have to check Kvantum theme on your Xfce, or do you have both KDE Plasma and Xfce installed and logging in from the same user?
For that you might want to take a look here:
Is it looking better if you change the icon theme to dark variant?
switched to kde version, everything better now!