The latest update about the situation is that ASRock revealed at Computex that it plans to enter the European market very soon. HardwareLuxx heard ASRock cards should be on German retail shelves from July.
The first card to be sold in Germany will be a Radeon RX 56, with a Vega 64 following at a later point. VideoCardz adds that fully custom cards from ASRock are in the works, but it's unknown when these will be available.