LineageOS and especially operating systems based on it are the opposite of privacy and security hardened. It does not appear to matter to people recommending moving to those throughout these threads that they use generative AI themselves:

https://github.com/LineageOS/charter/blob/main/ai-coding-assistants.md

Here's another recent thread addressing a way people are being misled:

https://grapheneos.social/@GrapheneOS/117217086326813038

Motorola Mobility is wholly owned by Lenovo and has nothing to do with Motorola Solutions beyond a shared history prior to 2011.