How to transfer redirect rules from .htaccess to php nginx handler?

Question

Nginx

How to correctly transfer .htaccess to nginx php handler? The site itself uses 1C-Bitrix - CMS, but has many new modules and redesigned functions. Almost everything came out to be transferred, except for a few details. Namely:
The link to the news should look like the URL https://smoservice.media/news/?ELEMENT_ID=764766 without index.php (now it is generated automatically and added to the links, for example, in the regular article directory smoservice.media/blog/
Also, the theme color switcher does not work on the https://smoservice.media/telegram/ page (and on the product page), but it works fine on all other
pages.The system also has multi-site from 1C-Bitrix, so all these rules should work and other domains (eg.https://smmbang.ru).

Options -Indexes  
ErrorDocument 404 /404.php  


<IfModule mod_php7.c>  
  php_flag session.use_trans_sid off
  #php_flag default_charset UTF-8
  #php_value display_errors 1
</IfModule>  

<IfModule mod_rewrite.c>  
  Options +FollowSymLinks
  RewriteEngine On

#RewriteMap access txt:/var/www/smoservice/data/www/moonlight.smoservice.media/blacklist_.txt
#RewriteCond ${access:%{REMOTE_ADDR}} deny [NC]
#RewriteRule ^ - [L,F]


#RewriteRule ^pages/([a-z0-9_]+)\.php$ /pages/$1/ [R=301]

#RewriteRule /upload/iblock/fe4/fe4e297043821e32102ef5e25c1ab40f\.jpg /assets/img/social-icons/a-facebook.png

RewriteCond %{REQUEST_URI} !(/$|\.)  
RewriteRule (.*) %{REQUEST_URI}/ [R=301,L]  

RewriteCond %{THE_REQUEST} //  
RewriteRule ^.*$ https://smoservice.media/$0 [R=302,L,NE]  

RewriteRule ^fast/index\.php$ /fast [R=301,L]  
RewriteRule ^fast/index\.php/$ /fast [R=301,L]  

RewriteRule ^index\.php$ / [R=301,L]  
RewriteRule ^(.*)/index\.php$ /$1/ [R=301,L]  

RewriteRule ^catalog/([a-z0-9_\-]+)/?$ /$1/ [R=301,L]  


#    RewriteRule ^fast/?$ /fast/item.php [NC,L,QSA]

#    RewriteRule webfonts/(.*)$ https://smoservice.media/assets/vendors/font-awesome/webfonts/$1 [NC,L,QSA]
#    RewriteRule ^img/(.*)$ https://smoservice.media/assets/img/$1 [NC,L,QSA]


      RewriteRule ^fast/([a-z]+)/?$ /fast/item.php?type=$1 [NC,L,QSA]

      RewriteRule ^fast/([a-z]+)/([a-z\-_]+)/?$ /fast/item.php?type=$1&sub=$2 [NC,L,QSA]


      RewriteRule ^subscriptions/([a-z]+)/?$ /subscriptions/service.php?type=$1 [L,QSA]

    RewriteCond %{QUERY_STRING} ^type=(\w+)$
    RewriteRule ^fast/$ /fast/%1/? [L,R=301,QSD]


      RewriteCond %{REQUEST_FILENAME}.php -f


      RewriteRule ^pages/([a-z0-9_\-]+)/?$ /pages/$1.php [NC,L,QSA]


    RewriteCond %{HTTP_HOST} ^www\.smoservice\.media$ [NC]
    RewriteRule (.*) https://smoservice.media/$1 [R=301,L]

    RewriteCond %{HTTP_HOST} ^moonlight\.smoservice\.media$ [NC]
    RewriteRule (.*) https://smoservice.media/$1 [R=301,L]

  RewriteCond %{REQUEST_FILENAME} !-f
  RewriteCond %{REQUEST_FILENAME} !-l
  RewriteCond %{REQUEST_FILENAME} !-d
  RewriteCond %{REQUEST_FILENAME} !/bitrix/urlrewrite.php$
  RewriteRule ^(.*)$ /bitrix/urlrewrite.php [L]
  RewriteRule .* - [E=REMOTE_USER:%{HTTP:Authorization}]



</IfModule>  

<IfModule mod_dir.c>  
  DirectoryIndex index.php index.html
</IfModule>  

<IfModule mod_headers.c>  
    Header set X-Frame-Options SAMEORIGIN
    Header set X-Content-Type-Options nosniff
</IfModule>  

<IfModule mod_mime.c>  
    AddType font/opentype .otf
    AddType application/x-font-woff .woff
    AddType application/x-font-woff2 .woff2
    AddType application/x-font-ttf .ttf
    AddType application/vnd.ms-fontobject .eot
    AddType image/svg+xml .svg
</IfModule>  


<IfModule mod_expires.c>  
  ExpiresActive on
  ExpiresByType image/jpeg "access plus 3 day"
  ExpiresByType image/gif "access plus 3 day"
  ExpiresByType image/png "access plus 3 day"
  ExpiresByType text/css "access plus 3 day"
  ExpiresByType application/javascript "access plus 3 day"
  ExpiresByType application/x-font-woff "access plus 1 year"
  ExpiresByType application/x-font-woff2 "access plus 1 year"
</IfModule>  


<ifModule mod_gzip.c>  
mod_gzip_on Yes  
mod_gzip_dechunk Yes  
mod_gzip_item_include file .(html?|txt|css|js|php|pl)$  
mod_gzip_item_include handler ^cgi-script$  
mod_gzip_item_include mime ^text/.*  
mod_gzip_item_include mime ^application/x-javascript.*  
mod_gzip_item_exclude mime ^image/.*  
mod_gzip_item_exclude rspheader ^Content-Encoding:.*gzip.*  
</ifModule>

Question. What needs to be added in order to solve the problem of adding index.php to the internal links of the elements in the first place + their further redirect to the page with "/" when opened by the user in the browser.