I have the same issue. I have a MacBook Air M3 ~85GB of available storage, Live in the US, I have no other languages or settings adjusted, and I have 15.1 downloaded. Still not seeing Apple Intelligence.

How do I download iOS 18.1 Beta? 18.1 is not listed on https://beta.apple.com/enroll-your-devices#ios is no longer showing 18.1 beta as an option to download. Yesterday, I updated my iPhone 15 Pro Max to iOS 18.0 Developer Beta yesterday, and there is still no sign of Apple Intelligence. I then thought it must be related to my Apple ID, so I got on my Mac and downloaded Sequoia 15.1 Developer Beta. I restarted all my devices and I am still not seeing Apple Intelligence. It also appears that Apple has taken the 18.1 beta download off the site, and Mac OS seems to only be showing 15.0. Are the .1 updates no longer available for beta testing? Any insights would be appreciated. Other info: 78.9 GB of Free storage on the iPhone 15 Pro Max I live in the US Siri is enabled on all devices I have a developer account