Hello, I was going through loss functions and managed to get a list of loss functions that aren't implemented yet. I found these using pytorch and tensor flow kindly refer for more informations.
The list goes as:

1. HingeEmbedding Loss (taken by me)
2. CosineEmbedding Loss (taken up by @kartikdutt18)
3. MultiLabelMargin Loss
4. TripletMargin Loss
5. L1 Loss
6. BCE Loss

This might not be complete list. I will update this list as I find more.
I hope this is ok with the community. Kindly feel free to take up any of the idle loss functions here.
Thank You. :)