Trying to run php-fpm package will throw following error:
$this->bbcode_second_pass_code('', 'php-fpm: error while loading shared libraries: libicuuc.so.63: cannot open shared object file: No such file or directory')
Installing "icu" package does not help, because it only installs libicuuc.so.64, while PHP needs older version.
Problematic version is php-fpm-7.3.5-1. This is on RPi3 (armv7l).