I can even correct CHATgpt when I ask for her help and she makes a mistake.

That must keep you very busy…

Idea Summary
I'd love to see a structured UI, with spaces for the syntax arguments:

f?p=App:Page:Session:Request:Debug:ClearCache:itemNames:itemValues:PrinterFriendly

Use Case
navigation queries between pages

Where specifically do you have a need for this? It already exists for interactive use when creating component links, buttons, and branches in the form of the Link Builder:

and programatically via the apex_page.get_url() API method:

APEX_PAGE.GET_URL (
    p_application        IN VARCHAR2 DEFAULT NULL,
    p_page               IN VARCHAR2 DEFAULT NULL,
    p_session            IN NUMBER   DEFAULT apex_application.g_instance,
    p_request            IN VARCHAR2 DEFAULT NULL,
    p_debug              IN VARCHAR2 DEFAULT NULL,
    p_clear_cache        IN VARCHAR2 DEFAULT NULL,
    p_items              IN VARCHAR2 DEFAULT NULL,
    p_values             IN VARCHAR2 DEFAULT NULL,
    p_printer_friendly   IN VARCHAR2 DEFAULT NULL,
    p_trace              IN VARCHAR2 DEFAULT NULL,       
    p_triggering_element IN VARCHAR2 DEFAULT 'this',
    p_plain_url          IN BOOLEAN  DEFAULT FALSE,
    p_absolute_url       IN BOOLEAN  DEFAULT FALSE )
    RETURN VARCHAR2;

@fac586  

I do use the link builder (that's my first choice)

I do use apex_page.get_url() 

However, it seems that in some instances, I need the f?p syntax - such as in my navigation tree view.. 

I'll re-try using the apex_page.get_url() 
 

WITH menu_tree AS (
   SELECT 
       LOWER(menu_short) AS menu_desc, 
       node_id,
       parent_id,
       tooltip,
       SYS_CONNECT_BY_PATH(node_id, ':') || ':' AS menu_path
   FROM tree_menu
   START WITH parent_id IS NULL
   CONNECT BY PRIOR node_id = parent_id
),
menu_filtered AS (
   SELECT 
       LOWER(menu_short) AS menu_desc,
       parent_id,
       node_id,
       mega_menu,
       tooltip,
       page_no,
       url_param_items,
       url_param_values,
       seq,
       icon_class,
       request,
       p0_show_all, -- include the P0_show_all column
         -- Concatenate P0_NODE_ID, P0_SHOW_ALL, and URL_PARAM_ITEMS
       'P0_NODE_ID,P0_SHOW_ALL'
       || CASE 
              WHEN url_param_items IS NOT NULL THEN ',' || url_param_items
              ELSE ''
          END AS full_param_items,
       -- Concatenate node_id, P0_SHOW_ALL value, and URL_PARAM_VALUES
       TO_CHAR(node_id)
       || ',' || p0_show_all
       || CASE 
              WHEN url_param_values IS NOT NULL THEN ',' || url_param_values
              ELSE ''
          END AS full_param_values


   FROM tree_menu
   WHERE mega_menu = 'Y' AND
   EXISTS (
           SELECT *
           FROM (
               SELECT menu_tree.menu_path
               FROM menu_tree
               WHERE UPPER(menu_tree.menu_desc || ' ' || tooltip) 
                     LIKE '%' || UPPER(:P0_SEARCH) || '%'
           ) mp
           WHERE mp.menu_path 
                 LIKE '%:' || tree_menu.node_id || ':%'
       )
)
SELECT
   CASE 
       WHEN CONNECT_BY_ISLEAF = 1 THEN 0 
       WHEN LEVEL = 1 THEN 1 
       ELSE -1 
   END AS status,
   LEVEL,
   menu_desc AS title,
   icon_class as icon,
   --'icon-tree-folder' AS icon,
   -- Use the pre-constructed full_param_items and full_param_values
   'f?p=&APP_ID.:' 
   || page_no 
   || ':' 
   || :APP_SESSION 
   || ':' 
   || NVL(request, ' ')               -- 4th param = REQUEST
   || ':'
   ||'&DEBUG.'                         -- 5th para = debug
   ||'::'                              -- includes 6th null for clearCache
   || menu_filtered.full_param_items   -- items in 7th place
   || ':' 
   || menu_filtered.full_param_values      -- values in 8th
   ||':'                                   -- null for PrinterFriendly
    AS link,
   node_id AS value,
   CASE 
       WHEN page_no = :app_page_id THEN 'YES' 
       ELSE NULL 
   END AS is_current,
   tooltip
FROM menu_filtered
START WITH parent_id = (
   SELECT node_id
   FROM tree_menu
   WHERE parent_id = (SELECT node_id FROM tree_menu WHERE parent_id IS NULL)
   START WITH node_id = :P0_NODE_ID
   CONNECT BY PRIOR parent_id = node_id
)
CONNECT BY PRIOR node_id = parent_id
AND LEVEL <= 4
ORDER SIBLINGS BY TO_CHAR(seq, '9999'), menu_desc;

This should be a rare use case for advanced users who are familiar with the documentation and link syntax. If not, then the component making use of f?p should be enhanced to use link builder instead., but I am not seeing that here.