I don't know about the specifics of DDR5, and specifically LPDDR5, as used by Apple, but many other manufacturers solder their chips, although their specs say t

I don't know about the specifics of DDR5, and specifically LPDDR5, as used by Apple, but many other manufacturers solder their chips, although their specs say that the speed is the same as in models with separate DIMMs. One such example is the HP Elitebook 1040 G9. The tablet-like version has soldered RAM, whereas the regular has external modules. They both use 4800 MHz DDR5.