I actually did a quick look at comparing SNW season 3 and THE BOYS season 5.
From Trekmovie.com
SNW:
Episode 1 - 471 million
Episode 2 - 471 million (both 1 and 2 premiered the same week, looks like they counted them as one)
Episode 3 - 472 million
Episode 4 - 397 million
Episodes 5-10 - I can't find the numbers, but it never made the top 10 shows again for those weeks, though one Paramount+ show (NCIS: TONY AND ZIVA) did make the chart one week at 371 million minutes, but that was #8 that week. Which means SNW's numbers were definitely smaller than that.
From tvline.com
THE BOYS:
Episode 1 - 899 million
Episode 2 - 899 million (both 1 and 2 premiered the same week, looks like they counted them as one)
Episodes 3-8 - I can't find numbers of viewed minutes.
Not sure I'd call THE BOYS a phenomenon, but the numbers are definitely larger than SNW. The fact it's on Amazon probably helps... it's likely far more people have that as one of their streaming services than Paramount+.