In theory, but that is not the case with Lunar Lake, which nowadays does not have a greater bandwidth than the current CPUs with external LPDDR memory.
However, at launch, a year and a half ago, it had a bandwidth about 15% higher than competing CPUs.
For a really "massive increase in bandwidth", it would have needed a wider memory interface, like AMD Ryzen Max, which has a 256-bit memory interface, instead of the 128-bit memory interface of most Intel/AMD laptop CPUs.
However, at launch, a year and a half ago, it had a bandwidth about 15% higher than competing CPUs.
For a really "massive increase in bandwidth", it would have needed a wider memory interface, like AMD Ryzen Max, which has a 256-bit memory interface, instead of the 128-bit memory interface of most Intel/AMD laptop CPUs.