In TFJS if you find a model with not supported ops you can still run in native mode with Node.js:

  
      

      blog.tensorflow.org
  

  
    

Run a TensorFlow SavedModel in Node.js directly without conversion 2

  The TensorFlow blog contains regular news from the TensorFlow team and the community, with articles on Python, TensorFlow.js, TF Lite, TFX, and more.