What an EICR checks
An EICR looks at the fixed wiring of a property. It is separate from a PAT test of plug-in appliances.
An EICR is a report on the fixed electrical installation. That means the wiring, the consumer unit and the fixed fittings, rather than the appliances you plug in.
A PAT test is a separate visit. It looks at portable equipment. If a property needs both, they are booked as two certificates.