Estimates are at 1M Xeons a month [1], so there have been more units of PS5 and thus CPUs sold to a single customer in the same timeframe than units of Xeon CPUs over all customers.

NVDA sold 153 million Tegra units to Nintendo in 8 years, so 1.5M units a month. That's just as comparable.

[1] https://www.servethehome.com/on-ice-lake-intel-xeon-volumes-...