Count number of leaves in the final ensemble such as LightGBM

[samanemami]

The lightGBM features have a method that returns the total terminal nodes and the tree leaves
This method is as follows;
#4944 (comment)

Also, the GBDT-MO dump the trained model which is so useful and we can use it as a pre_trained model, this example.

My question is can we return the total leaves number such as LightGBM?

If there is no related method, I would be glad to add it with your help.

Thank you