I don't feel rushed, so no worries for asking
(how else would you know? (through the hidden cameras?! (or mind reading?! (or mind reading cameras?!!?!?! (AHhhhhhhhhhhh))))).
Spanking is not a big one for me, so it's low on the priority list, especially if there is a full new scene needed for it. If I can fit it in an existing scene (like with Tricia's expanded rape play) then I will. But there are other new scenes ahead of it I would rather spend time working on, and I'm not likely to work on them either (for all the reasons I've already talked at length about).
I haven't reached out to Ferdafs at all, and I have no idea if they even know or care about my remake. Also, it feels like a weird conversation to have, "hey, I'm the asshole that stole your work, changed your story, and stuffed it into renpy, can you make some art for me?" Yeah, that doesn't seem like something that would go down well... I think I'll just keep hiding in this thread...
I don't know if Ferdafs does request, but you could try asking them to make scenes. That is where most new content is going to come from. Again, mostly what I'm doing is edits, and bringing content into Ren'py.