Yes, if your hotel has a view of Mount Etna, and there is currently lava flow, you’ll be able to see it glowing orange at night.  We saw it on our visit in January of 2023.  And, if you don’t have a view of Mount Etna from your hotel room, don’t fret!  You can see Mount Etna from many places in town, including the black and white terrace of Piazza IX Aprile and the terrace by the Porta Catania parking garage.