htaccess How to change parameter to behind slash

Question

I want to change the url rules so that the output become like this:

http://localhost/project/report/public

http://localhost/project/salesorder/public

is the same to

http://localhost/project/report.php?public=Y

http://localhost/project/salesorder.php?public=Y

and i can still add another parameter behind the public so it could be like : http://localhost/project/report/public?year=2020

How to achieve this? this is my current htaccess to navigate everything to controller and to remove the .php in controller

site root .htaccess:

RewriteEngine On

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule .* controller/$0 [L]

controller/.htaccess:

RewriteEngine On

RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME}.php -f
RewriteRule ^(.*?)/?$ $1.php [L]

Thankyou