>>18123877
I'm too lazy to find proper sources but it is a documented linguistic phenomenon of English "r" sounds going from phonetically closer to "L" to "W", and it's been happening fairly recently and rapidly across most native English dialects starting from within the past 50-100 years. It's why native English speakers can't really roll their Rs, because they way we make our R sound is completely different from every other languages' Rs.
As a native English speaker I can tell the differences between our Rs and Ws quite easily, though I'm not really sure how to describe it since I don't have any real education in linguistics or speech pathology. The best description I can give is that Ws are more "wide" while Rs are more "tight".
If you can find audio recording of older English speakers then you could probably hear them pronouncing their Rs more in line with other languages.
Give it another 100 years or so and we'll all be speaking uwu speak, unironically.