It is unlikely that we will offer this functionality due to technical constraints related to the rapid movement of satellites, which require precise and high-speed tracking. The motion of satellites (and the ISS) across the sky is much faster ...
Yes, this feature is available. The coordinates used are those of the J2000 datum (right ascension and declination) and can be found on sites such as Wikipedia or Stellarium.
No, Hestia will not be able to track objects. The Gravity by Vaonis app will guide the user to do the tracking manually. A motorized mount is being considered to accompany the instrument.