Remove index.php? from URL with question mark | Codeigniter

Hi Dear codeignite forum Community i am newbie in Codeignite coding so i hope you guys give me the time to fix this error thanks is advance
So basically i followed a tutorial here and i disabled index.php from URL that problem was fixed but i still have the remaining question mark ? i tried every tutorial here in codeignite forum eventually i manage to remove the index.php but the question mark remains so how to remove index.php? and finally have example.com/index.php?/signin to example.com/signin without index.php and ? mark
here is my htaccess folder

Code:

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{THE_REQUEST} ^GET.*index\.php [NC]
RewriteRule (.*?)index\.php/*(.*) /$1$2 [R=301,NE,L]

RewriteCond %{QUERY_STRING} ^(.*)i=[^&]+(.*)$ [NC]
RewriteRule ^(.*)$ /$1?%1%2 [R=301,L]
</IfModule>
AddType text/vtt .vtt

Please someone help me admin or somebody i have not been answered for 2 days now

@MTR2021 I’m sorry you haven’t had a response yet. I e read all your messages, but I am not a pro with Apache so don’t have an immediate suggestion.

You might try moving your thread to the Support forum, which is more appropriate for help requests.

please use default .htaccess from CI4.

replace this line:
RewriteRule ^([\s\S]*)$ index.php/$1 [L,NC,QSA]

with this line:
RewriteRule ^(.*)$ index.php?/$1 [L,QSA]

Then,set:
App -> Config -> App.php :

public $indexPage = ''; //'index.php';

This is working for me.