MRG Effitas 360 Assessment & Certification – Q1 2020 https://www.mrg-effitas.com/wp-content/uploads/2020/05/MRG_Effitas_2020Q1_360.pdf
OK, so basically Win Defender is pretty good except when it comes to the Exploit/Fileless test. It also didn't give any false positives which is a first.
Although its missed percentage rate was the same as Kaspersky's; both having the lowest rate of vendors with missed detections. Of note is what was tested was WD ATP with all possible mitigations enabled including all available ASR ones.