SOLR not available on Php 7.4 FPM

Hello,

I need to use Solr extension for my Moddle site; I installed it and it works fine on Php-Cgi. However, it is not available for Php-FPM. I tried all the ways to make it available, but couldn't succeed. It is installed on my server but Php-FPM doesn't see it as a Php Module. What could be the reason and how can I get it work for FPM too? I will appreciate if anyone could help me.

Thank you in advance.
Tumer