I think yes, also with the new update, kill logs and all other activities counters will be logged so this could be easily added to the game.
Most of these counters will be reset tho, as this scoreboard doesnt exist and when it comes out, everything except for the total xp will be at 0.
But something like most donated amount is controversial imo, some people would maybe want to stay anonymous to avoid arguments/bullying and what not else.
I think in osrs they have like a forum where all the players submit/show off their personal bests at bosses(idk), so we could have like a leaderboard if this would be ever invented, to make it more official for us?