Probably not. The dual-core parts are DIE450 (which is shared with some single-core parts like the H750 series!), but STM32H735 is DIE483.
Do you know if it's fabbed in house, TSMC, or Samsung? I've seen ST silicon from all 3 foundries but the only thing I've seen stated publicly is 40nm. When I get it opened up it should be easy to tell, TSMC and Samsung processes have distinctive features on them that I recognize by sight.
Now this would be a cool blog post!