I'll be honest I expected more. This is supposed to be the defacto "iconic" Playstation release that's been hyped for decades.
This is where we get back to wildly unrealistic expectations that have no basis in reality. FF7 PS1 sold about 10m units. Respectable, but being the "de facto" Playstation release is lunacy.
Gran Turismo outsold FF7 on the PS1. Granted, not by a lot, but GT was the most popular game on that platform.
Since then GT3 and GT4 outsold it by significant margins on PS2. GT5 outsold it on Ps3. All while each successive FF entry sold less than FF7 did year after year.
If anything is the "de facto" Playstation series, Gran Turismo is, but no one expects Gran Turismo Sport on PS4 or GT7 on ps5 to clock up double the sales of GT4 because that would be crazy. GT has its audience, and no amount of hype is going to drastically expand that overnight.
Sony dumped a ton of money into expanding first party output in the PS4 Era, which led to Horizon, TLOU (with the sales of Remastered), God of War, Spider Man, and Uncharted 4 also speeding past the 10m that FF7 did. It's still early, but Tlou2 and GOT will also likely break that mark.
But none of these games are anything like FF7. They aren't even JRPGs. Sony hasn't bothered to make a significant JRPG for Playstation since Legend of Dragoon on PS1, or the Dark Cloud series on PS2 if you're feeling generous.
The audience buying Sony for their first party output aren't looking for JRPGs and that genre has had little movement since the PS1 Era. If anything every other genre has adopted character progression and compelling narratives which were the reason those games stood out.
There is no coherent reason to believe FF7R will outperform the original by much. It's a good game, but it is by no means the kind of game Sony has built its audience and reputation on since the late 90s.