One would almost think they both started from nothing in 2019, the way you are presenting these facts.
Before the 2019 season the Qatari had spent 1,2 billion on players (857M net) alone and has been investigated for FFP violations since. Since 2019 PSG has spent 220M net while also getting players like Messi, Donnarumma and Ramos on a free and getting fined for breaking and bending FFP rules for their wagestructure. No club in the history of football has been more financial doped than PSG since the Qatari took over in 2011. Their main sponsors are themselves through an 800M deal with the Qatar Tourism Authority (!), who is not even hiding that they are a using sports to project a great and polished image of the state of Qatar, which is the only reason their books were in balance pre Covid (Wonder if they have got their money worth for that sponsorship?). Since covid not even a new shiny sponsorship by Qatar Airways has been enough to keep their books in balance. Without these gargantual sponsorship deals with other state owned Qatari "companies" they would have depts bigger than ours. PSG has spent 5 x the money of their closest rivals in France the last 12 years. There is a lot of food for FFP there to say the least.
Probably won't be like that here though, they'll probably just invest in the infrastruture and let ETH do his thing.
PS! Nice has spent 124M net on players since 2019 and now has the 5th most valuable squad in the league (ref. transfermarkt), yet they have not semented their place among the top 4 teams in France. That is crazy stuff.