Since this explorer is database-free, it doesn't natively support address balances & transaction history. However, you can check it in :
https://explorer.nusacoin.org/address/nu1q2szmx8ntpvu4nhuj70xqa9muwg4ec3sl5dhwte{
"isvalid": true,
"address": "nu1q2szmx8ntpvu4nhuj70xqa9muwg4ec3sl5dhwte",
"scriptPubKey": "00145405b31e6b0b3959df92f3cc0e977c722b9c461f",
"isscript": false,
"iswitness": true,
"witness_version": 0,
"witness_program": "5405b31e6b0b3959df92f3cc0e977c722b9c461f"
}