.htaccess on host gator is not removing .php extension and adding trailing slash

So I have recently uploaded my new website to hostgator.

I am trying to remove .php extension and add a trailing slash to all my urls.

For example

website.com/about.php should change to website.com/about/

I have the htaccess code that has worked for other websites on different hosts, but when i tried it for this website on hostgator it doesnt work.

This is the code I tried:

RewriteEngine On
RewriteBase /

## hide .php extension snippet

# To externally redirect /dir/foo.php to /dir/foo
RewriteCond %{THE_REQUEST} ^[A-Z]{3,}\s([^.]+)\.php [NC]
RewriteRule ^ %1/ [R,L]

# add a trailing slash
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_URI} !/$
RewriteRule . %{REQUEST_URI}/ [L,R=301]


# To internally forward /dir/foo to /dir/foo.php
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME}.php -f
RewriteRule ^(.*?)/?$ $1.php [L]


RewriteCond %{SERVER_PORT} 80
RewriteRule ^(.*)$ https://website.co.uk/$1 [R,L]


RewriteCond %{HTTP_HOST} ^www.website.co.uk [NC]
RewriteRule ^(.*)$ http://website.co.uk/$1 [L,R=301]

Currently I now have this in my htaccess:

RewriteEngine On
RewriteBase /
RewriteCond %{THE_REQUEST} ^[A-Z]{3,}\s([^.]+)\.php [NC]
RewriteRule ^ %1 [R=301,L]
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME}.php -f
RewriteRule ^(.*?)/?$ $1.php [NC,L]

# remove www and turn on https in same rule
RewriteCond %{HTTP_HOST} ^www\. [NC,OR]
RewriteCond %{HTTPS} !on
RewriteCond %{HTTP_HOST} ^(?:www\.)?(.+)$ [NC]
RewriteRule ^ https://%1%{REQUEST_URI} [R=301,L,NE]

Hostgator added this htaccess for me which basically redirects http requests to https and removes http://www.website.co.uk and www.website.co.uk to website.co.uk

What can I do to remove .php extension and force trailing slash?

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