If you insert a picture in the insert picture format, I can't display it. The high probability is that the position of your illustration doesn't give you enough space. You can select the picture, right-click the size and position, and zoom this place. The percentage will be changed to 1/5 of the current display scale, for example, my picture will be changed from 35% to 7%, and then click OK to see if it is displayed normally.

If it can be displayed normally after modification, it means that this is the case and the cell size of the inserted picture needs to be adjusted.

If this method can't be solved, right-click on the picture, and there will be one on the top floor. Select it to solve it, because there may be other pictures covering your picture.