site is reachable but phpmyadmin not

hello site is reachable but phpmyadmin is not

server { listen 80; listen [::]:80; server_name localhost; root /var/www/html;

add_header X-Frame-Options "SAMEORIGIN";
add_header X-Content-Type-Options "nosniff";

index index.php;

charset utf-8;

location / {
    try_files $uri $uri/ /index.php?$query_string;
}

location = /favicon.ico { access_log off; log_not_found off; }
location = /robots.txt  { access_log off; log_not_found off; }

error_page 404 /index.php;

location ~ \.php$ {
    include snippets/fastcgi-php.conf;
    fastcgi_pass unix:/var/run/php/php-fpm.sock;
    fastcgi_param SCRIPT_FILENAME $realpath_root$fastcgi_script_name;
    fastcgi_hide_header X-Powered-By;
}



location ~ ^/phpmyadmin/(.+\.php)$ {
    alias /usr/share/phpmyadmin;
    include snippets/fastcgi-php.conf;
    fastcgi_pass unix:/var/run/php/php-fpm.sock;
    fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
}

location ~* ^/phpmyadmin/(.+\.(jpg|jpeg|gif|css|png|js|ico|html|xml|txt))$ {
    alias /usr/share/phpmyadmin;
}

location ~ /\.(?!well-known).* {
    deny all;
}

}