Back in the PS4 era when I had FIOS gigabit it was incredibly frustrating to have that internet speed with a console which would download things at 10-15Mbit. There were some tweaks which would double it plus or minus a bit, but, it was fundamentally incapable of using anything close to line rate.

PS5 is incredibly faster. Sony is using Akamai CDN now (they didn't when I checked in the PS4 era) and I consistently max out the PS5s gigabit port (I have 10G symmetric at home).