HP Laptop 15s (AMD Ryzen 4000 series) memory issues

[SkyHound0202]

So I purchased an HP 15s-eq1125nw Laptop in Poland, which should include 8 GB DDR4-2666 MHz RAM memory in dual channel configuration (2 × 4 GB module). Since the processor, the AMD Ryzen 5 4500U, natively supports 3200 MHz memory, I thought that the laptop was limited by the max speed of the module (2666 MHz)

However, on the device I received, I was surprised to discover that it actually came with only one 8 GB DDR4-3200 MHz module (part number: 4ATF1G64HZ-3G2E2), rather than the advertised two 4 GB DDR4-2666 MHz modules. Essentially, this downgrades the dual channel memory configuration to a single channel one, losing 50% of the advertised bandwidth, which is particularly devastating to Ryzen processors and their integrated Vega graphics since they rely heavily on the wider memory provided by the dual channel memory configuration.

Furthermore, and perhaps more troubling, even with a 3200 MHz module factory-installed and the processor natively supporting 3200 MHz module, the system still runs at 2666 MHz. The memory speed setting cannot be modified in BIOS. This means not only I lost half of the available memory bandwidth, but I cannot even make up the loss in bandwidth through higher memory speed.

These findings present a few unanswered questions:

a) why I received a different, inferior configuration compared to the manufacturer-listed specification?

b) why the system refuses to run at a higher memory speed and disallow changes to be made in BIOS, even though both memory modules and the processor supports a higher rated memory speed?

While I can certainly pay with my own fund to purchase a compatible module to set up a dual channel configuration, the inability to run the memory at a higher speed just because of a missing BIOS/firmware feature is certainly a tough pill to swallow.

I hope both of problems can be addressed, first one through exchanging the single module for two modules (or alternatively provide an opportunity to purchase an identical module) and latter one through a BIOS update to unlock the memory speed selection (or just allow the memory to run faster).