The E1 series from iON features cover frames measuring 80 by 80 mm, available from 1-gang to 5-gang, in alpine white, matt alpine white, and matt black. The series also includes socket outlets with hinged lids, with USB and USB-C, without earthing, and modular jacks for networks.
For dimmers, there is a central plate that fits the E1 frames, including for a duo dimmer. If you are upgrading from a single socket outlet to two side-by-side, you simply replace the frame with a 2-gang version.