What's the wallet you are using?
What's the platform you are using for trading?
Without knowing the answers to above questions is impossible to understand what's the issue you are talking about.
I guess you are trying to sell an ERC20 token on decentralized exchange? Right?
And what do you mean by not seeing tokens? Do you mean an address has a token but it's not shown on block explorers?
No.
It's about etherscan website itself
I noticed an address that trades tokens but does not have them as usual in the tokens tab and generally does not show that it has them