Since those libraries are not stocked with Windows or CPython but are rather specific to the MinGW toolchain, you need to link to them statically (or place, together with their dependencies, alongside the .pyd, a location which is searched).
Since those libraries are not stocked with Windows or CPython but are rather specific to the MinGW toolchain, you need to link to them statically (or place, together with their dependencies, alongside the .pyd, a location which is searched).