GTM Kit has support for the the TI WooCommerce Wishlist plugin. What do you mean by “customized add_to_wishlist event”?
There is an event add_to_cart which is displayed in ecommerce reports.
By analogy, I would like to add the add_to_wishlist event to google analytics
The add_to_wishlist event is already supported with TI WooCommerce Wishlist. If it doesn’t work for you it may be because your theme does not implement the wishlist button in the standard way. If you have a test site you can test it with the Storefront theme.
I mean these are the events in woocommerce https://prnt.sc/17Z0O999pv9T.
As you can see add_to_wishlist is not here
Take a look in Google Tag Manager Preview mode and see if the event is there
Do you still need help or can i close this?