Some questions about GPU acceletarion

Hello, I am very curious about GPU acceletarion. I have noticed that GPU acceleration has not yet been implemented in many mainstream fully homomorphic encryption libraries. Now, I have the following questions:

  1. Why can’t GPU acceleration be implemented in those mainstream libraries now?
  2. What are the technical challenges of using GPU to accelerate homomorphic encryption?
  3. Compared to other mainstream FHE libraries, what are the advantages of your library?
    Looking forward to your reply, thank you!

You can use Phantom(GitHub - encryptorion-lab/phantom-fhe: PhantomFHE: A CUDA-Accelerated Homomorphic Encryption Library) to use GPU
acceleration. Now it support BGV,BFV,and CKKS.