From what I am seing in their Patreon, for months they have been writing updates only about their other VN, Noemi’s Toscana Rebirth. I did not see if Agent of Heels is officially abandoned but it really feels that way, unless there is something in the post I cannot read.
This VN did not reach a wide audience despite the good graphics, I blame the horrible User Interface for that. It had been a long time since I played this, but I remember being a nightmare to play. In Renpy it would have been much better.