Hi,
Thanks for the feedback.
That's right, there is for the moment, no email for the product approval or for the vendor publication.
We can see to add these two emails in HikaMarket but for the vendor part ; I'm not sure that we can send an email to the vendor each time his "published" state is update.
Because if in the backend you unpublish/publish a vendor, he will receive an email each time you publish it.
Maybe it's better to have a button "approve" when you are in the vendor edition page in the backend ; so the button will publish the vendor and send him an email.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.