Possible to create a URL/Hyperlink for new item (Automatically)?

What is the intention of getting the Row URL? I'm sure this is possible using the publicly available API by getting the row ID, and then concatenating it to a URL for the sheet -- however, there may be some work arounds depending on why you need the row URL.

If you want to go the API route, here is a script I've made with Python which can do this function for you:

import smartsheet
access_token = 'YOUR_ACCESS_TOKEN'
smartsheet_client = smartsheet.Smartsheet(access_token)
sheet_id = 'YOUR_SHEET_ID'
sheet = smartsheet_client.Sheets.get_sheet(sheet_id)

# RENAME "getRowId" WITH YOUR ROW COLUMN FOR PYTHON TO PASTE ROWID (replace this to your column name)
columns = sheet.columns
for column in columns:
    if column.title == "getRowId": 
        column_id = column.id
        break

# Append the row ID of each row to column_id column (getRowId)
rows = sheet.rows
for row in rows:
    row_id = row.id
    cell = smartsheet.models.Cell()
    cell.column_id = column_id
    cell.value = row_id
    updated_row = smartsheet.models.Row()
    updated_row.id = row.id
    updated_row.cells.append(cell)
    smartsheet_client.Sheets.update_rows(sheet_id, [updated_row])

With this python script, I was able to achieve the desired result here:

Where Base URL column is the formula

="https://app.smartsheet.com/sheets/SHEET_URL_HERE?rowId=" 

and where Full URL is just:

=[Base URL]@row + getRowId@row

You could also just entirely remove the Full URL column and change the base column to be:

="https://app.smartsheet.com/sheets/SHEET_URL_HERE?rowId=" + getRowId@row

Hope this helps!