The model can be loaded with the following code snippet.
from diffusers import AutoencoderKLQwenImage
vae = AutoencoderKLQwenImage.from_pretrained("Qwen/QwenImage-20B", subfolder="vae")
[[autodoc]] AutoencoderKLQwenImage - decode - encode - all
[[autodoc]] models.autoencoders.autoencoder_kl.AutoencoderKLOutput
[[autodoc]] models.autoencoders.vae.DecoderOutput