I don’t have comprehensive Linux knowledge, I’m more of an ignorant Windows GUI user that dives into specific Linux topics to for example get secondary systems/servers to help get the maximum out of my Windows desktops.
There are experiences of another user having SSD performance issues on Linux while booting Windows on the same system showed the drives performing as fast as expected:
My lay person gut feeling would say: The firmware of the SSDs is optimized for a specific pattern of usage under which the SSDs reach the advertised speeds. These patterns might be counter-intuitive and default benchmarks don’t access the SSDs in this particular fashion leading to lower performance results.