Just a reminder, unlocking and relocking the bootloader will factory reset your device. Also be carefull locking a rooted phone with a patched boot image (for root) can result in a non booting phone.As far as my experience goes, they only dislike root, not an unlocked bootloader. Not sure if Netflix and other widevine L1 DRM apps still work. I use a magisk module to circumvent that, but I don't use my phone as a streaming device generally.
Try it. You can always relock your bootloader if something turns out to not work after unlocking.