Tensorflow builds for 64bit ARM. Bazel for arm64 is also included if you want to compile tensorflow yourself.
Built on Debian 10.4 Buster ARM64 port with Python 3.7.3. Known to work on Debian arm64 install, including Android Userland app. Should work on 64bit Raspberry Pi OS (buster) builds also.
Install using pip:
sudo apt-get install python3 python3-pip python3-numpy python3-h5py
sudo pip3 install https://github.com/sanjayseshan/tensorflow-aarch64/releases/download/v2.4.0/tensorflow-2.4.0-cp37-cp37m-linux_aarch64.whl