Transaction declined PancakeSwap Smart Router V3

Question

I am trying to exchange 1 USDT for some BNB. By using PancakeSwap Smart Router V3 and python web3.

example code

tokenOut = web3.to_checksum_address("0x1d2f0da169ceb9fc7b3144628db156f3f6c60dbe") # XRP
tokenIn = web3.to_checksum_address("0x55d398326f99059ff775485246999027b3197955") # USDT
weth = web3.to_checksum_address("0xbb4CdB9CBd36B01bD1cBaEBF2De08d9173bc095c") # weth
fee = 4000
recipient = wallet 
deadline = int(time.time() + 6000)
qty = Wei(10**18) 
min_tokens_bought = 0

tx = pancake_smart_router_contract.functions.exactInputSingle(
       ( 
            tokenIn, 
            weth, 
            fee, 
            recipient, 
            deadline, 
            qty,
            min_tokens_bought, 
            0
        )
        )

tx_params: TxParams = {
        "from": wallet_addr,
        "gas": Wei(250_000),
        "gasPrice": web3.eth.gas_price,
        "value": Wei(0), 
        "nonce": web3.eth.get_transaction_count(wallet)
        } 

        
transaction = tx.build_transaction(tx_params)

signed_transaction = web3.eth.account.sign_transaction(
        transaction, 
        private_key=private_key
        )

a = web3.eth.send_raw_transaction(
        signed_transaction.rawTransaction
        )

However i am getting error in blockchain.

You can view the transaction in detail here

https://bscscan.com/tx/0x0a7c4d902f62e19f3d3f0581580a4bfcec48a17c99945da87442affdcad2c62e

Please help me what am I doing wrong? I also have problems with the estimate_gas function for this exchange. If you have developed similar functionality please share the correct usage code.