فَإِنْ كَانَ مُفْرِدًا بِالْحَجِّ نَوَى بِتَلْبِيَتِهِ الْحَجَّ
Translation: If performing Hajj al-ifrād, one intends Hajj in conjunction with the talbiyah.
Mufrid bi-l-ḥajj is a pilgrim undertaking Hajj al-ifrād: the intended rite here is Hajj, not a combined Umrah-and-Hajj intention.
The distinctive arrangements of qirān and tamattuʿ are taught separately later. Here the governing question is which rite is intended at entry.