Almost every Federation member state maintains their own fleet - of course, they tend to be more along the lines of the Coast Guard in role; and mostly running older or natively built ships. Like, the Andorinan Imperial Navy is still a thing, it's just more like the Swiss Guards, the USS Constitution, or similar "legacy" units and formations, kept in service as much if not more to preserve a tradition considered well worthy of preserving for its historical and or cultural value as for actual military or functional value.
Though obviously plenty of the member fleets do absolutely have such value.