Apple's M7 Ultra chip coming in 2028 is designed to support up to 1.5TB of unified memory, according to Bloomberg's Mark Gurman. However, whether such a configuration is offered may depend on the state of the ongoing memory chip shortage.

In 2019, Apple released an Intel-based Mac Pro with up to 1.5TB RAM.
This article,

Apple's stores will be rolling out Back to School marketing materials this week, according to Bloomberg's Mark Gurman. This suggests that the offer will begin in the U.S. in the next few days.

Last year, college students and educational staff could receive a free accessory like AirPods 4 or an Apple Pencil Pro with the purchase of a qualifying Mac or iPad model. The Back to School offer is in addition to the discounted prices already availab

Macworld