No worries. No such intention at this point. Just explaining https://www.whonix.org/wiki/Free_Support_Principle, responsibilities (due to lack of better term).
Not at time of writing.
See Based on Debian.
Figuring out how to
connect Ubuntu VM directly to a wifi adapter independent of host is a good exercise indeed if you later try to solve is it posibel to configure whonix gatway through usb dongle?. And even better exercise would be
connect Debian VM directly to a wifi adapter independent of host.
However, this exercise can be perfectly done without involving Whonix support. Since Whonix isn’t involved for the prerequisite, exercise, https://www.whonix.org/wiki/Free_Support_Principle applies.
Though, I should add I suggest this as exercise:
connect Debian VM directly to a wifi adapter independent of host
- a Debian VM
- preferably using the
buster release since that was that Whonix version at time of writing number 15 is using
- inside VM using
ifupdown (that is because Whonix-Gateway uses
ifupdown, not network manager or systemd-networkd at time of writing) 
- disconnect host internet for testing purposes
Asking for is it posibel to configure whonix gatway through usb dongle? getting implemented is a feature request. See Community Feedback. Making that happen requires contributions - such as solving that exercise independently.
 That seems simpler than trying to port Whonix-Gateway to network manager or systemd-networkd.
ifupdown perhaps in combination with https://packages.debian.org/buster/wpasupplicant but it’s been a while since I used that.