Nope, here sat is the Nirguna Brahman who takes the Saguna forms.
It's same as the worship of all deities culminates in the worship of the Brahman. And the vice versa is also true that all the worship goes to the Brahman only.
According to Nirvana Upanishad, how a yogi achieves Nirvana aka Moksha is given.:
विष्णुविद्यादिशताभिधानलक्ष्यम् । .
The (worship of) gods named Vishnu, Brahma and a hundred others culminates (in Brahman). (Verse 29).
And Who is that Brahman after oneness with whom a yogi gets nirvana.:
परापवादमुक्तो जीवन्मुक्तः | शिवयोगनिद्रा च ।
Liberated while alive, as they are freed from denial of the highest (Brahman). The oneness with Siva is their sleep. (Verse 24-25).
So, Rig Veda 1.164.46.:
इन्द्रं॑ मि॒त्रं वरु॑णम॒ग्निमा॑हु॒रथो॑ दि॒व्यः स सु॑प॒र्णो ग॒रुत्मा॑न् । एकं॒ सद्विप्रा॑ बहु॒धा व॑दन्त्य॒ग्निं य॒मं मा॑त॒रिश्वा॑नमाहुः ॥
They have styled Him as Indra, Mitra, Varuṇa, Agni, and he is the celestial, well-winged Garutmat, for learned priests call the One by many names as they speak of Agni, Yama, Mātariśvan.
Shambhu alone is known by the names of Indra, Mitra, and Agni. For the sake of those who are confused , Brahmanas speak of them in different ways.
~ Brahma Purana 2 (88) Bibek Debroy.
I hope this clarifies your queries. Prd..