Wallet support for LTC

Is there any specific reason why BitPay and Copay wallets dot support LTC? Both are really good every day wallets but I’m surprised there’s no LTC support. Anybody know what’s the reason?

Remember this Litecoin Payments Startup That Won Trader Favor Abruptly Shuts Down - CoinDesk

Back then I had the suspicious that some Bitcoin maxis bribed them to stop development.