I don’t need the receipt number but wanted the status.
Now, I can answer your original question as you provided all the information.
The dependents can appear for H-4 visa stamping using the previously approved H-1 petition, and copy of the amendment receipt. I assume you are working at the new location on the basis of amendment petition. So they should also carry employment letter showing the new location and any client/project information for the new location (if applicable).
LCA gets certified and not approved. So it would remain at current status. What is now important is amendment which you said is still “case received”. Track that.