LaptopDesktop Motherboard Memory Slot DDR4DDR5 Diagnostic

I have seen an article about DDR5 ram and they said it is compatible with DDR4 motherboard slots and how they function, but I have seen that

Supports DDR5 Memory, up to 5600 MHz; Core Boost : With premium layout and digital power design to support more cores and provide better performance

ddr5 in ddr4 slot DDR4 stopped at 16-gigabit memory chips, but DDR5 can use up to 64-gigabit memory chips The latter also supports die stacking with up to eight

ddr5 slot Is it possible to upgrade your older DDR4 laptop to use DDR5 memory? No DDR4 and DDR5 SODIMM memory sticks are not interchangeable