I see where you are coming from
The pedal does look as if it can take some form of cleat
Some early pedals had a triangle at the front with a lip, then a cross ridge.
You slid the shoe cleat in and then a recess on the pedal cleat accepted the crosspiece to fix the cleat in place.
Shimano track pedals fitted this way:
Both the triangular recess and crosspiece are present on the Wellgo pedal, so it is not unreasonable to suggest that they would take a cleat of this type
However I would thing that unless Wellgo make a cleat for this pedal then it would be difficult to source, and a quick Google confirms this
As above use a modern SPD type system