There's a lobbying group called 5rights that has designed and promoted the UK OSA, AU OSA, California KOSA, Federal KOSA, and more. This isn't some conspiracy. They take proudly take credit for these bills on their website, and in news coverage you'll see their same couple media personalities over and over: https://5rightsfoundation.com/our-work/

As usual for online censorship, Techdirt has had excellent coverage for years: https://www.techdirt.com/tag/baroness-beeban-kidron/