The current Homebrew formula for rclone builds a version of the binary that doesn't support mounting, even when macfuse is installed independently (#4775). I've created a Homebrew cask that downloads and installs a fully featured version of rclone from the project's GitHub releases page (and includes the macfuse cask as a dependency). I'm making an issue here so other Homebrew users who want to have a scriptable, fully-featured rclone install can know about it.

The cask is here: https://github.com/brettferdosi/homebrew-tap/blob/main/Casks/rclone-cask.rb - feel free to use it directly (though no guarantees about timely updates) or copy it into your own tap. I asked about getting this included in the main Homebrew cask tap but the response was negative: Homebrew/homebrew-cask#106519.