@Nerome
The easiest way would be to import ERC2x transactions via ETH API(https://cointracking.info/import/eth_address/). Please check if your CORE trade is imported here.
See this article as well: How to import DEX trades like Uniswap, 0x, Kyber Network, SushiSwap (https://cointracking.freshdesk.com/a/solutions/articles/29000036759?lang=en)
But if you do not own them then not sure why it should be a trade. Once a trade take place you own the coins.
Another idea would be to add those transactions at a separate "virtual" wallet with those trades. Possibly if it ends you get the ETH back which will be another trade
Then you can add the income as "staking" oder "interest income". They will appear in the income report as part of your tax report.
This FAQ could helps as well: Loans and their repayments (https://cointracking.freshdesk.com/a/solutions/articles/29000033408?lang=en)

And if you trade 2 currencies and receive 1 amount of LP Tokens and vise versa you can take 50% of the LP token amount and add it as counterpart currency for one of your currencies. And the other 50% for the other one which are part of the trade(s).