In Star Trek: Lower Decks, Season 2 Episode 10, we see a Federation ship named USS Archimedes. I couldn't quite decide what class it was supposed to be. It's rather reminiscent of the Excelsior-class, but - the nacelles are quite different, e.g. with red-lit tapering at their front and blue at the bottom; the deflector dish looks somewhat like a Sovereign class' dish; and the accordion-like section connecting the "engineering section"/lower-hull to the saucer section is longer than on Excelsior-class ships.
So what ship class is this? Or - is it a new one?
Screen captures of the Archimedes (no spoilers):
A refit Excelsior, for reference: