The same currencies received from different blockchain networks are reflected in the account as one amount.
For example, you have 30 USDT on Solana in your wallet, then someone sends you 20 USDT on Polygon. On your NC Wallet balance, you will see a total sum of 50 USDT.
You also can send any amount from this sum to different blockchain networks. For example, 10 USDT to Ethereum and 40 USDT to Solana.