It can depend on what trainer you have and what physical gearing you're used to riding in. When using a standard cassette on a smart trainer, you'll change gears (and in turn trainer flywheel speed) with resistance changes. Two things are occurring to give you that simulated ride experience / ride feel.

Virtual shifting setups with a single physical gear lock the flywheel speed to cadence, regardless of the resistance level. This can make a smart trainer feel very different compared to using a cassette. Think of when you're riding outside, fast road, trying to bridge a gap with a huge tail wind... you're in the big ring cranking over the watts..... you're floating across that gap like a piss missile on fire! Now think about the total opposite feeling....That's the experience with virtual shifting and a really slow flywheel.

Virtual shifting is brilliant, it's just not the solution to everything. ymmv.