You can check your testnet balance at https://testnet.suivision.xyz/

try in sui explorer or using slush wallet

• https://testnet.suivision.xyz/
• https://suiscan.xyz/testnet/home

You can check your Sui testnet balance using the Sui CLI with the command sui client gas --address <your-address>. This lists all SUI coins associated with your address on testnet. Alternatively, use a testnet explorer like Suivision or SuiScan, select the "Testnet" network, and enter your wallet address to view your balance and transaction history.

Alternatively, visit https://suiscan.xyz/testnet/home