The LAGOtrials package bundles third-party code:

D3 (v7)
  Files:     inst/js/d3.v7.min.js
  License:   ISC
  Copyright: 2010-2023 Mike Bostock
  Full license text: inst/js/d3-LICENSE

All other files are part of LAGOtrials and are covered by the package license
(GPL-3), see the LICENSE / DESCRIPTION file.