The two figure can be reconciled if an iPhone user visits more web pages than an Android user.
It is well known for decades that a Mac user spends many times more on software for that Mac than a PC user spends for software, so it is reasonable to conclude that an iPhone user visits more web pages.
Global desktop market share for macOS is 15.31% according to https://gs.statcounter.com/os-market-share/desktop/worldwide