The virtual keyboard to allow to fill up text in search fields in the Eclipse and Harmony (and possibly the Stage) is still not implemented.
As a workaround, the LG ThinQ app provides this functionality (the older LG TV Plus app also). For the Eclipse Mk 1, just join it as it was a regular LG TV. However, just the part that is common to LG screens can be accessed. The B&O app must be used for the rest.
Since B&O now use stock LG screens, I think the LG ThinQ app is the way to type text now if you don’t want to fill character by character with the Beoremote 1.