Shimano's Ultegra R8000 crankset with 46/36 chain rings is still the best option for a cyclocross double, but it won't work with the GRX front derailleur. - Cyclocross Magazine - Cyclocross and
Shimano FC-TY501 chainset 46 / 30 double 7 / 8-speed 175 mm with chainguard black - The Bicycle Chain