Hi Sakshi Powade,
Thanks for posting in the community. We are happy to help you.
Per your description, the list item is newly created and when you search through the search bar, the list item cannot be searched.
As far as I know, this is possible when searching for newly created items. This is because the SharePoint search feature automatically crawls existing items in your organization every so often, not in real time. Typically, you will need to wait a few minutes before attempting to search for that list item.
In this case, if you've waited longer than 15 minutes and still can't see the list item after searching, I suggest you try one of the methods and check again. See if you can see it in the search results.
- Check the list settings and reindex the list
Make sure that you have at least the Edit permission (Site Member)
In the list, click Settings in the upper-right corner> List settings> Advanced settings
In the Search setting, make sure that the "Allow items from this list to appear in search results" is set to "Yes".
In the Reindex List settings, click on "Reindex List", choose "List content is missing from search results", click "Reindex List", go to the bottom of the Advanced settings page and click OK.
After that, I recommend you wait a few minutes, refresh the SharePoint page, and search for this item again.