auto
on what basis or why you think Prajñā is about concept?
is it because of the term 'suñña' means emptiness as like hollow without inherent existence?
1) Prajñā (प्रज्ञा, “wisdom”) or prajñāpāramitā represents the last of the “six perferctions” (ṣaṭpāramitā) as defined in the Dharma-saṃgraha (section 17). The Dharma-samgraha (Dharmasangraha) is an extensive glossary of Buddhist technical terms in Sanskrit (eg., ṣaṣ-pāramitā and prajñā). The work is attributed to Nagarjuna who lived around the 2nd century A.D.
Prajñapti (प्रज्ञप्ति) refers to “thought construction” or “mental images”, according to the The Laṅkāvatāra Sūtra chapter 3.—“the triple world is no more than thought-construction (prajñapti), there is no reality in its self-nature; by means of this thought-constructed reality, logicians go on discriminating. Individual form, reality, thought-construction, — these are [only] a mental disturbance; transcending all this, my sons will walk where there is no discrimination”.
https://www.wisdomlib.org/definition/prajnapti
As far as I understand the Prajñāpāramitā texts wisdom (Prajñā) is in understanding how dhammas are non-existent, or how they only have nominal existence and so are only concepts (Prajñapti).
Edward Conze lists six ways in which the ontological status of dharmas is considered by the Prajñāpāramitā:[35]
Dharmas are non-existent because they have no own-being (svabhava).
Dharmas have a purely nominal existence. They are mere words, a matter of conventional expression.
Dharmas are "without marks, with one mark only, ie., with no mark." A mark (laksana) being a distinctive property which separates it from other dharmas.
Dharmas are isolated (vivikta), absolutely isolated (atyantavivikta).
Dharmas have never been produced, never come into existence; they are not really ever brought forth, they are unborn (ajata).
Non-production is illustrated by a number of similes, i.e., dreams, magical illusions, echoes, reflected images, mirages, and space. It is through seeing this Tathātā that one is said to have a vision of the Buddha (the Tathāgata), seeing this is called seeing the Buddha's Dharmakaya (Dharma body) which is a not his physical body, but none other than the true nature of dharmas.
https://en.wikipedia.org/wiki/Prajnaparamita
This is totally different to the Abhidhamma. In the Abhidhamma dhammas are empty of self or what belongs to self, but they aren't empty of existence.
also thanks for elaborating what you think so far, its appreciated.
You're welcome.