It literally is the AU-220M. Though I would take the choice of armament with a grain of salt. This is either a prototype or a mockup. It's far from obvious what it's eventual weaponry would have been.That new BMMP has quite an unconventional design, like its made to be more amphibious than a BMP-3 or BT-3F.
(It's very regrettable that the Indonesian Navy will not get anymore the BT-3F or more BMP-3F.)
Is that a 57 mm turret? And is it based on the AU-220M?