The house brand one-piece bar and stem on my Orbea Orca Aero comes with a forward computer mount which holds my Garmin 1xxx flush.
Looking up at the computer mount you can see the angle-adjustable bolt that holds it to the forward/bottom of the stem/handlebar, and the two screws which hold the bayonet mount. One for Wahoo computers is included as well, and there two fore/aft positions as well two click positions for each (12-6 and 3-9).
The computer mount from above with my Garmin removed showing the spacer which fills the void in front/behind the round bayonet mount piece, depending on which position you choose. The rearward position actually fits the 1xxx as seen in the first pic.
Super clean computer mount on the #Orbea