How to handle conditional dropdown lists

My form has two fields.
The first one is a dropdown list displaying a list of categories, and the second one is a data list that displays a list of users.
The data list options depend on the category selected in the dropdown list.
E.g.:
U…
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Where should I redirect after filling a "creation" form?

HI hope y’all doing well
I have an app where users need to create different items.
There’s a page that displays all the items created that as a "Create new…" button.
The user’s path:
User goes to the "all items" pag…