The plants have yet to acclimate to the new site, establish a viable root system, etc. It takes time, how much depends upon the the size and age of the plants, vigor, the transplanting technique, and the after care. Among other factors.

The best thing you can do is to maintain a healthy mulch layer over a considerable soil area. Many people devote a tiny mulch ring around a tree, which is inadequate.

If problems occurred in the transplanting steps, your trees may never properly recover. Planting too deeply is one of the most common transplanting/planting errors.

There can be a plus as where you removed those, if not completely reworked will send up quite a few shoots that can also be removed easier and re-planted and will produce many new plants.