Left panel: XRISM Resolve simulation (40 ks) of J1810 with a photoionised absorption model (two narrow components). Resolve gate-valve closed is adopted. Top-right panel: Resolve simulation with a broad-line model. Bottom-right panel: XRISM Xtend simulation with the broad line model simulation. In both panels, the pion component has been removed to show that the strongest lines are still detected.