I know of no one who makes any seated female pilot figures, in any scale, and for any time period let alone in the garb of a WW I pilot. That's not to say there isn't one out there, but I haven't seen one, ever.
However, there is a series of figures made in a what-if scenario, if WW I hadn't ended when it did. That's Luftkrieg 1919, https://www.luftkrieg1919.com/ They produce in 1/32, as well as 1/16. Their series includes a number of women, though, they're all in standing poses, as far as I know, and they have a good deal of a steampunk look to them. But you might be able to modify one.
For that matter, you could probably find some other 1/32 female and modify the figure to fit in the cockpit.
If anyone else knows of a 1/32 seated female pilot in WW I gear, though, I'll be interested to see it.