unet is supported (you can run a unet model through OpenVino's Model Optimizer to produce IR):
The recommended repo is different from yours:
The link https://docs.openvinotoolkit.org/R5/_docs_MO_DG_prepare_model_convert_model_Convert_Model_From_TensorFlow.html is not working. Could you please share the updated link?
The link you mentioned points to a previous release of the documentation. The following is the same link on the latest version of the documentation.