The “zip” PHP extension for PHP version 7.3 is compiled with Libzip version 1.1.2 in EasyApache 4:
# /opt/cpanel/ea-php73/root/usr/bin/php -i | grep Libzip
Libzip version => 1.1.2
A newer Libzip version isn’t provided at this time, however case ZC-4670 is open to request the inclusion of a newer Libzip version.
In the meantime, if you are open to using CloudLinux, they provide a newer Libzip version with their Alt-PHP package:
# /opt/alt/php73/usr/bin/php -i | grep Libzip
Libzip headers version => 1.3.2
Libzip library version => 1.3.2
Let me know if there are any additional questions I can help you with.