Currently there's only one person in platinum and he's rank one. As for checking your elo, not %100 percent sure, but if you check here, you'll be able to see where you stack up against everyone else.
You can't check specific elo values, no. Only your rank.
She/They
Yeah, I only don't like erthtkv2 because of the mod's name. Make it "tkv2," and the mod will instantly become more popular. This is a valid reason as the name of the mod is still an important feature that no one seems to have yet discussed.