Resolved! STM32G473/4 FMC/FSMC feature, pin called FMC_NL and FMC_NADV in datasheet DS12712 rev 5
I'm working on migrating a design from STM32F405 series to STM32G473 series, both LQFP100 package, both use FSMC for access to external SRAM (in multiplexed mode; I have separate address latches clocked from FMC_NADV capturing A0..A15 from D0..D15.) ...