Uniswap is an ETH tool, so not sure what the cub you bought is.

From the ETH side, you can buy Wleo and log into leofinance, move to LEO and back to Bleo

Then cub.  It's kind of messy getting assets on the BSC the first time.  Unless of course you have a Binance account.

Feel free to jump into discord and ask about it in my channel or the leo channel they are very helpful

https://discord.gg/efT9yDM3