That one you link to above.
https://www.wix.com/corvid/example/service-page
It does look very similar to this one as well.
https://support.wix.com/en/article/corvid-tutorial-creating-a-bookings-timetable
Plus, as you say that when you use the template in the Wix Editor it all works, yet when creating the same page on your own website that it doesn’t seem to work.
That indicates to me that you may have just missed something out when you made up your own page on your website.
The code itself you can simply just copy it all and add it to your page on your own website, so there shouldn’t be any issues there.
However, if you have added the elements onto your own page or copied them over from the tutorial itself, then I would make sure that you go back through and make sure that everything is where it should be, everything is connected correctly, any event handlers are added back onto any needed element, any dataset connection is reapplied if needed etc.
Check the properties panel for the elements to see if the tutorial had any event handlers added where you have not added them to your own page, especially on the datasets as one of those needs an onReady event added to it as well.
Make sure that every element id in the code matches the actual element on the page too, a text box on your page can be called #textbox1 , however if it is then called #serviceName in your code it won’t work either, they have to all match.
Finally, make sure that you do have your own items in your own datasets too, otherwise your page won’t be showing anything.