No, the IONIQ 5 cannot (yet) charge bidirectionally.
The IONIQ 5 charges both AC and DC exclusively monodirectionally: up to 10.5 kW with the three-phase on-board charger or up to a maximum of 220 kW at an 800V DC charging station.
But the IONIQ 5 can – thanks to an additionally installed small inverter – also provide energy when stationary in the form of alternating current from the battery via a single-phase 220V socket (110V in the USA), which can be used to feed small tools or appliances such as a laptop. However, the power is limited to a single-phase 3.6 kW and is only possible in “island” mode. This new feature cannot guarantee that the mobile power source of the IONIQ 5 is grid-compliant (according to VDE-AR-N 4105:2018-11 resp. VDE V 0124-100 standards, which concerns fixed inverters with grid feed), which, on the other hand, is the case with the stationary inverters of solar systems.
This is why this charging option is called V2L (vehicle-to-load) (also by Hyundai itself) and not V2G (Grid) and also not V2H (Home) or V2B (Building).
One can assume that the V2X function is prepared in the IONIQ 5, however, and that this vehicle could also be charged/discharged bidirectionally via the Combo2/CCS DC connector – as soon as ISO15118 comes into force in spring 2022 – because it does not require any special hardware but “only” a SW activation – and of course the explicit warranty extension on the part of the manufacturer to the V2X function. Whether and when the manufacturer HYUNDAI will release this, however, is not yet known.