Issue with [proxy_fcgi:error] [pid 1539011] (70007)The timeout specified has expired

I need assistance on debugging my apache2 + php8.2-fpm.

based on apache2 error log,

there is a lot of error

[proxy_fcgi:error] [pid 1539011] (70007)The timeout specified has expired: [client xx.xx.xx.xx:58990] AH01075: Error dispatching request to : (polling), referer: https://xx.xx.xx/

My current settings for

i am using mpm_worker + apache2 + php8.2-fpm

[php8.2-fpm pool settings]

pm = dynamic
pm.max_children = 133
pm.start_servers = 10
pm.min_spare_servers = 5
pm.max_spare_servers = 20
pm.max_requests = 500
php_admin_value[memory_limit] = 128M
request_terminate_timeout = 600s

[mpm_worker settings]

[mpm_prefork]
StartServers         5
MinSpareServers      5
MaxSpareServers      10
MaxRequestWorkers    133
MaxConnectionsPerChild 1000

[apache settings]

Timeout 600
ProxyTimeout 600
MaxKeepAliveRequests 100
KeepAliveTimeout 5

[php.ini settings]

max_execution_time = 600

Appreciate if anyone can help to give an idea where to look for in to find the problem.
thanks in advance