that 8428 driver pack from Dell is a Realtek UAD driver, unlike the 8425 version from Dell (which is a classic non-UAD version of the Realtek audio driver). you should have used 7zip to check its contents.
the Realtek HWID "INTELAUDIO\FUNC_01&VEN_10EC&DEV_0298&SUBSYS_102807BE" is listed in the HDXDELLSSTCSMB2018.inf file and notice the INF file section begins with this [AzaliaManufacturerID.NTamd64.10.0...15063]; means driver requires at least Win10 build 15063 (RS2).
also when installing that v8428 "UAD" driver, there should be some Realtek Software Components listed in the Software Components section of Device Manager, and "Waves APO" should also be listed as a "Device Extension" somewhere in Device Manager.
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