One of the reasons I wanted to get a Pixel 6 phone was Google advertising boh Tensor and Titan M2 chips as improved security features against baseband attacks (compared to pre-Pixel 6 phones).
This doesn't make sense and we aren't aware of any marketing making any such claims. Please provide a source for your claims.
Do Tensor and Titan M2 chips in Pixel 6 offer worthy improvements in baseband security (for security staff personnel) when using GOS compared to Pre-Pixel 6 phones running GOS?
Tensor Pixels use different radio implementations for cellular and Wi-Fi/Bluetooth. These were isolated components on previous devices and are still isolated components. We aren't aware of any marketing claiming it is more secure than the Snapdragon radios. We don't see any particular reason it could be considered more secure.
Does GOS security hardenining compensate for lack of Tensor and Titan M2 chips in GOS-supported pre-Pixel 6 phones when it comes to baseband attacks? I know pre-Pixel 6 phones also have Titan chips, but not the Titan M2 models found in Pixel 6 phones.
The secure element (Titan M) is not part of IOMMU isolation or how the OS communicates with the radios. It really has nothing to do with the radios.