Appalling as it is, Microsoft doesn't care whether users are offered the ability to NOT encrypt their OS drives or not. They further do not care whether we have required "recovery keys" or them being offered. Our friends over on NeoWin have laid things out nicely for everyone to review.
https://www.neowin.net/news/microsoft-may-default-encrypt-your-data-with-bitlocker-on-windows-11-24h2-home-pcs-too/
https://www.neowin.net/guides/how-to-prevent-windows-11-from-encrypting-your-disks-during-installation/
Also. Just a fore warning to ARM users. First generation Windows on ARM processors will NOT be allowed to run Windows 11 24H2
https://www.neowin.net/news/first-generation-windows-on-arm-pcs-will-not-be-able-to-run-windows-11-24h2/