For a government entity, an unreasonably large amount of their work is on GitHub. Examples:
Front end design system: https://github.com/alphagov/govuk-frontend
Project board: https://github.com/orgs/alphagov/projects/4
Requests for comment: https://github.com/alphagov/govuk-rfcs
Gov.uk infrastructure as code (WIP): https://github.com/alphagov/govuk-infrastructure
“The GDS way”: How they work, tech stack, processes, etc https://github.com/alphagov/gds-way
“Terraform modules for on-boarding with Cyber Security services eg define the IAM SecurityAudit role”: https://github.com/alphagov/cyber-security-shared-terraform-...
Full GitHub org with >1,500 repos: https://github.com/alphagov