Is there a possibility to use UMAP with Tensorboard projector. Indeed, at the moment, we can only use PCA or T-SNE with it.
Alternatively, is there a Python library that would allow generating interactive plots such as Tensorboard's?
the online version of the Tensorflow Projector does now include UMAP. I guess they have added that feature recently as I was using the projector quite some times lately and until last week they only provided PCA, TSNE or a custom visualization in the online version. But now it is there, give it a try.
Tensorflow Projector with UMAP
I didn't find a Python library to create such interactive visualizations as tensorboards but if you'd like to try a JavaScript Version you could start with this making-an-interactive-umap-visualization-of-the-mnist-data-set blog post. Here is the showcase: Online UMAP Explorer with three.js
