If the leak in this article has any validity then it sounds like TROS will be the third ST movie to continue with the soft reboot / remake in repeating and reusing many plot points and elements from the OT, in particular ROTJ for what this article talks about which is essentially ANOTHER Death Star but as a ship this time (still thats going on four! Or FIVE if you’re just talking about the use of “Death Star tech”) that can at the least take out whole continents or possibly even up to whole planets again as it reportedly has the same power level of the first DS.
Apparently it even has a trench in its design for what would be the third trench run now, though to be mimicking ROTJ they would need to fly into the ship in order to destroy it.
https://movieweb.com/rise-of-skywalker-onager-star-destroyer-star-wars/