Drake’s continuous integration has nightly jobs that publish the binary archives that are described in the Nightly releases section. The Ubuntu 18.04 (Bionic) binary archive is also used to publish a Docker image on Docker Hub. You can see the available Docker images here:
The latest image can be pulled from Docker Hub as follows:
docker pull robotlocomotion/drake:latest
Docker images based on the Ubuntu 20.04 (Focal) binary archive are not available.