gm. This is my first post here, i will do my best to be specific.

I started to work and build some python scripts to automate some operations on Polygon-PoS network.
I have the following working:(each one is a script)

• WRAP MATIC into WMATIC
• UNWRAP WMATIC into MATIC
• Check token approval
• Get token name and symbol
• Retrieve and save ABI from contracts
• APPROVE token contract to spend in our behalf
• SWAP one token in exchange to another one

The swap function(last one) I am having issues with some ERC20 tokens like:

• USDC = 0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359 # Metamask USDC on Polygon PoS
• USDT = 0xc2132D05D31c914a87C6611C10748AEb04B58e8F # Metamask USDT on Polygon PoS

These tokens(USDC,USDT) do not have the approve function like others:

• SFL = 0xD1f9c58e33933a993A3891F8acFe05a68E1afC05 # Metamask SFL on Polygon PoS
• WETH = 0x7ceb23fd6bc0add59e62ac25578270cff1b9f619 # Metamask WETH on Polygon PoS
• WMATIC = 0x0d500b1d8e8ef31e21c99d1db9a6444d3adf1270 # Metamask WMATIC on Polygon PoS

I can manage properly SFL, WETH and WMATIC. I can SWAP WMATIC to USDC but i can not SWAP USDC to any other token. What I am missing here? Can anyone explain to me how can i deal with these tokens that are not like the others listed here?

I tried to manage them like i did with WMATIC, WETH, SFL and others but they dont accept the same commands/functions. All transactions that i sent to blockchain fail. I can not debug deeper.

Thanks in advance.