It is on by default in Windows 11 Home if you go through the normal setup experience completely according to the Microsoft documentation. As part of the setup, you sign in to a Microsoft account, which then creates a TPM protector.

"Unlike a standard BitLocker implementation, device encryption is enabled automatically so that the device is always protected... When the administrator uses a Microsoft account to sign in, the clear key is removed, a recovery key is uploaded to the online Microsoft account, and a TPM protector is created. Should a device require the recovery key, the user is guided to use an alternate device and navigate to a recovery key access URL to retrieve the recovery key by using their Microsoft account credentials."

From https://learn.microsoft.com/en-us/windows/security/operating...

This is also how it's reported in the press:

"In fact, the mechanisms to do exactly that are already in place. Windows 11 Home and Windows 11 Pro both support automatic device encryption, with the Home version a more streamlined experience. You just have to sign into the machine with a Microsoft account, which nearly all people do during setup."

From https://www.pcworld.com/article/624593/is-your-windows-11-pc...

My main point is just that if you skip this, like a lot of privacy conscious people do, you might end up inadvertently not having encryption fully enabled.