A browser being based on Chromium has nothing to do with how private it is. Yes you are furthering an internet monopoly by using chromium. But there is noncorrelation between being based of Chromium and Privacy.

Yes it has, unless they plan to do significant changes to how the relevant JS APIs function, which is usually prohibitively expensive to maintain. Standard Chromium allows websites to fetch a lot of fingerprintable bits, this is even true for Brave. Tracking protection on Chromium is a joke.

Firefox on the other hand is better in this respect and even has a setting explicitly for resisting fingerprinting.