LP token value has exactly one source: the XRPL AMM pool reserves, combined with the live prices of the pool's two assets — there is no independent price feed for the LP token itself. ‘Oracle price’, the price the protocol uses to value LP collateral, is this same value with a haircut subtracted, posted on-chain periodically by the oracle bot; expect it to differ from the live DEX value by roughly the haircut percentage, not as a discrepancy.