According to the source code of Galaxy A42 5G's benchmark, the handset is running Qualcomm's latest Snapdragon 750G chipset. At the time of the phone's announcement, the chipset wasn't around yet, so we can see why Samsung was so secretive.
The source doesn't explicitly say it's the SD 750G but the configuration of two cores running at 2.21 GHz and six more ticking at 1.8 GHz along with the Adreno 619 GPU makes it quite obvious.
Impossible. That's 765G value.
They still have A32, A22 & A12 to push it onto... :I