Yes and no. Aurora Serverless isn't really "serverless", it's PG or MySQL binary compatible wire protocol with AWS custom storage engine underneath.
Provisioning of the compute part of the database is still at the level of "ACU" which essentially map to the equivalent underlying EC2s. The scale up/down of serverless V1 is clunky and when we tested, there was visible pauses in handling transactions in progress when a scaling event occurred.
There is a "V2" of serverless in beta that is much closer to "seamless" scaling, I assume using things like Nitro and Firecracker under the covers to provision compute in a much more granular way.
Provisioning of the compute part of the database is still at the level of "ACU" which essentially map to the equivalent underlying EC2s. The scale up/down of serverless V1 is clunky and when we tested, there was visible pauses in handling transactions in progress when a scaling event occurred.
There is a "V2" of serverless in beta that is much closer to "seamless" scaling, I assume using things like Nitro and Firecracker under the covers to provision compute in a much more granular way.