The entire Galaxy Z Fold4 spec sheet has been leaked online. It will pack a Snapdragon 8+ Gen1 SoC, 50 MP + 12 MP + 12 MP triple rear cameras, a 16 MP under-display selfie camera, up to 512 GB of storage and a 4,500 mAh battery that supports 25 W fast charging.
https://www.notebookcheck.net/Samsung-Galaxy-Z-Fold4-Leaked-spec-sheet-showcases-remarkable-improvements-over-its-predecessors.623211.0.html