This is a Bracket to mount a "Push Opener Hinge" from Ikea.
Used to open cabinets my pressing the door in, then the spring unlaches and pushes the door back out.
Based my bracket off the one bracket I had, but mine if a bit more heavy duty.
I made it so there are two slots underneath you can wrap a zip tie to hold the bracket in place, but it seems like it clips in well enough that I didn't need them.
UTRUSTA / BESTÅ Push opener:
If you print one of these upload a picture, I'd like to see!