Shimano has officially unveiled electronic shifting for its 12-speed GRX groupset ... Although 12-speed GRX now has a Di2 option, it’s limited to the 2x12-speed ‘Undroppable’ option ...

As [Jesse] points out in the introductory article on electronic shifting, it’s not a new concept, with everyone from Shimano (Di2) to Archer and others coming up with their own version.