Plastic, spring loaded, should stick shut, then pop open when pushed, has a magnet on the end?

Think its a part of a Two part fixing I have used in furniture
which you use instead of handles on doors and the metal
part is on the back of the door.

You push the front of the door or drawer and that part pushes the door out

That part you have slots into a sleeve

Something similar to this

Soft Close Damper

It’s came as part of a unit we gave bought, however it won’t hold the door close as it doesn’t lock in place.

OK then more like this
Push Magnetic Catch

Ikea mate – got loads of ’em!

Cheers all.