Problem with Canvas tyye

Hi
I have problem with this package : (Google material design)
https://assetstore.unity.com/packages/tools/particles-effects/google-material-design-47141
it is a package for making ui elements beautiful just like google buttons and toggles and ...
It just works when i use this package's ui prefabs in a canvas that is set to "Screen space-overlay"
but i don't want to use this settings. i wanna set that to "Screen space-camera" . because in this case i can set the oreder layer of the canvas . when it is set to "Screen space-Overlay" , i can't set the order layer of the canvas and all of ui elements are located in front of everything.
Is there any solution?
can anyone help me please???