NGINX Cannot Find PHP Files - php

Question

When I go to an address belonging to the .php extension, it gives an error and does not open the relevant file.
For example:
When I open the https://www.example.com/test.php file, it gives 404 error.
But
When I open the https://www.example.com/test.txt file it opens successfully.
Note:I am using Load Balance.
NGINX site configuration settings:
proxy_cache_path /tmp/cacheapi/examplecomm levels=1:2 keys_zone=examplecomm_microcacheapi:100m max_size=1g inactive=1d use_temp_path=off;
server {
proxy_cache examplecomm_microcacheapi;
proxy_cache_key "$scheme$request_method$host$request_uri";
proxy_cache_valid 200 302 30s;
if ($host = example.com) {
return 301 https://www.$host$request_uri;
}
root /var/www/xxx/public_html/www/eshop;
include snippets/php8.conf;
access_log /var/www/xxx/public_html/www/logs/examplecomm.acces.log;
error_log /var/www/xxx/public_html/www/logs/examplecomm.error.log;
error_page 404 /404;
error_page 301 /;
location ~* \.(css|js|pdf|zip|rar|txt|webp)$ {
expires 1h;
}
# Add index.php to the list if you are using PHP
index index.html index.htm index.php;
server_name example.com www.example.com;
location / {
rewrite ^/([a-z,_,A-Z,0-9,\/,-]+)/$ /index.php?page=$1&$query_string;
rewrite ^/([a-z,_,A-Z,0-9,\/,-]+)$ /index.php?page=$1&$query_string;
}
listen [::]:80;
listen 80;
}
snippets/php8.conf:
location ~ \.php$ {
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $remote_addr;
proxy_set_header Host $host;
proxy_cache_valid 3s;
proxy_no_cache $cookie_PHPSESSID;
proxy_cache_bypass $cookie_PHPSESSID;
proxy_cache_key "$scheme$host$request_uri";
add_header X-Cache $upstream_cache_status;
include snippets/fastcgi-php.conf;
fastcgi_pass unix:/var/run/php/php8.1-fpm.sock;
include fastcgi_params;
}
Could you help me?