Ask at Bus adda of Noida.
There should be other city buses also going via Noida.
Otherwise take bus from Aashram, Delhi on Mathura Road.
Some Lucknow buses go via YEW also. They will drop you at outer area of Agra.
It wasnt a smooth experience
went by NON AC bus since it starts from Noida City center early morning
had no idea where to step down
so went till ISBT
One Auto driver took to a AC bus for Delhi near Agra Fort
Bus owner said bus goes to Pari Chowk and Noida but it don't
asked to step down at zero point of YEW or under mahamaya flyover
so went till Sarai Kale khan and took metro back since it was a cheaper option to reach home
They can drop on expressway anywhere but not inside Noida
Will keep this in mind for next time
Where to get AC bus from Agra Fort to Noida?