• Debian 11 is approaching its end-of-life (vendor EOL date - August 31, 2026). Plesk Obsidian 18.0.80 will be the last release to support it.
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Question php extension don't appears on plesk panel

And what does the output of the command from step 8 of the instructions show, as well as phpinfo()?
 
The first screenshot is PHP 7.3. Can you check if the extension is available in PHP 7.4?

Tools & Settings -> PHP -> 7.4.* -> Extensions
 
I don't know why it doesn't show in the extension overview, but the extension works and is installed correctly. Otherwise, it wouldn't show in phpinfo().
 
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