Snapper snapshot missing after zypper transaction

The goal is to determine whether openSUSE Snapper creates a read-only Btrfs snapshot immediately after a zypper package transaction completes, or only when the systemd timer expires.

The documentation does not explicitly define whether snapshot creation is tied to transaction completion or timer expiry. Testing without production credentials is also uncertain because no official sandbox mode exists, and non-privileged access may suppress snapshot generation.

Assumed environment: openSUSE Tumbleweed or Leap with Btrfs root and default Snapper configuration.

Does Snapper generate a snapshot immediately after zypper finishes a package transaction?

Can snapshot creation be validated in a non-privileged test environment without production credentials?

Which configuration or unit defines the activation criteria?