Is the wooden-stud basement wall that runs next to & parallel to the shared concrete wall separating two townhouses load-bearing?
Seldom do we get this amount of information regarding construction issues. However, I still need some info. I’ll make some assumptions and you tell me where I’m wrong.
First, concrete party walls are used for 1) Fire Walls, 2) Sound Control, and 3) Structural.
If the walls are built as you have drawn them, (uniform width the full length of the building with wood framing added to interior) I’d assume the floor above is concrete not wood framing, because the supporting beams are steel not wood. If it is, then the walls are structural and they cannot be supported by wood (your 2 studs you want to remove).
To verify the party wall is concrete, I’d look in your wife’s DMZ area and see if the plumbing is exposed. If so, then it’s concrete. If not, more exploratory surgery may be required.
To answer your questions:

No, I doubt if the floor is supported by a few wood studs in one room. (I’d verify that the other rooms do not have studs.)

I doubt the floor is wood frame, as noted above.

The studs are not load bearing and therefore they can be removed (modified) and no screw jack is required.


Summary:
Please verify my assumptions before you remove the studs. If things are different, please notify.