Amazon released a Linux based client for the WorkSpaces service in Novermber of 2019 (https://aws.amazon.com/about-aws/whats-new/2019/11/amazon-workspaces-introduces-workspaces-client-for-linux/). Unfortunately, for non-Ubuntu users, the offical instructions (https://docs.aws.amazon.com/workspaces/latest/userguide/amazon-workspaces-linux-client.html#linux_setup) only list Ubuntu support and only a Deb package is provided. This guide will show how to install and use the client on RPM based distros like Fedora.
The WorkSpaces client requires the ackages gtk3, libsoup and webkit2gtk3. These should already be installed, but you can install them with the following command if they are now.
sudo dnf install webkit2gtk3 libsoup gtk3