Here are some for you
http://www.esoxrepublic.com/freeware/BlankDatums2.php
https://forum.cadmunity.com/t/hide-all-sketches-macro/290/4 (scroll down and check the macro uploaded by AlexLachance )
image.png
Here is another one from old forums https://forum.solidworks.com/thread/91782?start=15&tstart=0