3rd party keyboard full access

[Project Alice]

I searched the web for awhile and couldn’t find an answer so I figured I’d ask here.
If I give a keyboard full access; specifically the GIF keyboard I downloaded. Is it able to log keystrokes when it is not the active keyboard?
As in if I have the regular Apple keyboard being used to type, but have the gif keyboard installed and given full access, it obviously isn’t being used while I was typing a card number for instance. Is it able to access information from the other (Apple) keyboard even while not selected?

 

[iGeek2019]

Looking online I get the impression once you switch back to Apple’s iOS keyboard the Gif app won’t have access to any data you enter eg card numbers-given they’ve been “allowed” since iOS 8 I would have thought, by now, there would have been articles about data collection when using the stock keyboard?