For some context, this has been an issue for quite a while now. SFC and DISM do not detect any corruption for my installation either.
I am unable to access nor install Windows Media Player which is required for certain applications (such as for PS4 Remote Play) to function despite having Media Features enabled under Optional Features (as you can see below, WMP simply does not exist):

I am running Windows 10 Education x64 v1809.

I have also tried installing the Media Features install package (Windows_MediaFeaturePack_x64_1809Oct.msu) but get an error:

So I tried extracting it and using DISM to try installing it:

I'm running out of ideas and this has been an issue for at least three major content updates for Windows 10. Every update I've been hoping would resolve this issue. It's not high priority hence why I've waited until now to ask about it but it is quite a
nuisance.
Does anyone know of any method to install Windows Media Player other than reinstalling from scratch which may or may not even fix the issue?