At the moment my best DX on 6m FT8 RX is LZ2NW (2139km) in Bulgaria. There seems to be early Es from southern Europe with early spots of Spain, France, Italy, Switzerland and Germany. I have also spotted a couple of UK stations.
UPDATE 1032z: 10 countries spotted so far on 6m FT8 RX.
UPDATE 1854z: Best DX on 6m FT8 RX was EA8YV (2982km) earlier this evening.