According to the South China Post, in an article written by journalist Gulshan Rafiq, Pakistan is looking for a positive change under Biden's administration and to address it's concerns on regional instability.
They are concerned with the US ties with Modi's India, which were built up during Trump's administration, believing that US South Asia policies favour India.
Whilst, Amina Khan, director of The Centre for Middle East and Africa based at the Institute of Strategic Studies has been quoted in an article published in Xinhuanet by journalist Mohammed Tahir as saying:
A lot will depend upon how the intra-Afghan talks play out amd whether the Taliban will move towards a reduction of violence amd ultimately move towards a ceasefire.
Why is the Biden administration interested in mending military ties with Pakistan?
Washington considers Pakistan a major non-NATO ally, only sixteen other countries are considered such. That's not likely to change any time soon. Given Trumps tilt towards Modi's India, it's only natural for Biden to signal a break with Trump's foreign policy by tilting towards Pakistan. Plus this help restabilise relations in the area, concerns that were cited by observers of that particular foreign policy area.