Only two exchanges to use now and you can bookmark the link from coingecko. The coin might have other exchanges to trade and coingecko is faster with updates than coinmarketcap.
https://www.coingecko.com/en/coins/lethean#marketsTradeOgre and STEX.
Two trading pairs on TradeOgre: with BTC and LTC. 99% of trading volume for this coin is concentrated on TradeOgre. It is not because STEX is a bad exchange but because their mandatory KYC. On STEX, you can not make deposits or trade if you have yet successfully done your KYC.
STEX's KYC is followed the
AML-KYC policy in the Europe. They give you three or four options to submit your documents for KYC with third party companies or with internal team from STEX
If you don't want do KYC on STEX, TradeOgre is good for years. It is important to withdraw your crypto from Trade Ogre to your wallet because you don't know how that exchange will operate. Store your crypto on exchanges is risky and not good.