There are some questions floating around on the ARP Discord about where to find the RP.
Currently, RP is primarily concentrated on two servers: Israphel (Asmodians) and Siel (Elyos). Both of these are NA-East servers. There is some conversation of EU RPers mobilizing to start up a more lively RP scene without having to sacrifice some latency to play on the NA servers.
It is strongly recommended that you join the ARP Discord! You can join at discord.gg/3bk6xK7ZG4