It's not quite clear the extent of the NYDFS investigation, though it joins rumors (denied by Paxos) that they were also being investigated by the US Office of the Comptroller of the Currency (OCC), which regulates banks. Paxos has a provisional banking charter, which it received from the OCC in 2021. It also has a virtual currency license, which is issued by the NYDFS.
Paxos faces investigation over stablecoin offerings
CoinDesk reported that the New York Department of Financial Services is actively investigating Paxos, which issues both the Pax dollar (USDP) and the considerably larger Binance USD (BUSD) stablecoins.