Let’s search for imagick.so
find / -name 'imagick.so'
/usr/lib64/php/modules/imagick.so
/opt/rh/rh-php73/root/usr/lib64/php/modules/imagick.so
Let’s enable imagick extension module
nano /etc/opt/rh/rh-php73/php.d/20-imagemagick.ini
; Enable imagick extension module
extension=/opt/rh/rh-php73/root/usr/lib64/php/modules/imagick.so
Restart PHP 7.3 FPM
service rh-php73-php-fpm