vertical scroll

Does anyone know how to delete the gray scroll bar from the Wix site?
I’m a real fool who lacks the word “coding beginner.”
As far as I know, I tried every method and followed the method left by someone to do it like the image below. I can’t sleep if I don’t solve this.

It looks like you are trying to create a custom element inside your page code. I would take a look at this article about how to use custom elements and where to put your code to get started.

If you are new to code altogether, this is a more advanced topic so you may want to start with some courses on Javascript fundamentals if you have not already.

If you wish to style the site scrollbar, you shouldn’t do it neither through page code (it’s impossible) nor through a custom element (it’s not the best way).
You should do it through Website Dashboard > Settings > Custom Code
And use CSS only with no JavaScript (put it in the head, wrap the css in a tag and apply to all pages).
And read this article about styling scrollbars:

P.S.
I can see you tried ‘overflow-y: hidden’, but this way you won’t be able to scroll down at all, even if there’s some content at the bottom of the document. It is not a good idea (if you have content there, the user should be able to scroll and see it). If you want to style the scrollbar - style it and do not prevent scrolling.