ثُمَّ يَذْبَحُ إِنْ أَحَبَّ.
Translation: Then he sacrifices an animal if he wishes.
The words in aḥabba are crucial. Al-Quduri is describing Hajj al-ifrad. A pilgrim performing ifrad is not required to sacrifice merely because of that Hajj mode, though a voluntary sacrifice remains possible.
Do not apply this clause to the obligatory Hajj sacrifice for qiran or tamattuʿ. Those modes have distinct requirements treated in their own sections. Optional in ifrad does not mean optional in all Hajj modes.