I would like to ask about the new products containing colostrum, specifically the shower gel. Can this gel be used also for intimate hygiene and in this case, does it have any beneficial effects?

In general it is recommended to wash intimate areas with only water. Nothing bad will happen if you use the gel, but you need to be careful not to overuse any washing products because this may kill the lactobacillus that naturally resides in these body parts which maintains an acidic pH.