What's your laptop model? Check the specs of the laptop and see whether it's sold as an SSHD.
I'd be very surprised if a laptop OEM would install two separate drives with one being a 24GB SSD. The cost of the physical drive (package, connectors etc) and controller are constant regardless of the size of the SSD, so the price difference between a 24GB, 64GB and 128GB drive just isn't that big. Plus with that setup they'd need software (like Intel RST) to manage the cache. That's both more expensive AND more complicated than going with a single-drive SSHD solution. Also, it would be getting close cost-wise to a 128GB SSD + ~500/1K TB HDD setup which is just a much better solution.
SSHDs are a pretty good single-drive option. You should get most of the write-benefits and after a bit of training, a pretty hefty percentage of the read benefits for your commonly repeated tasks (reboots, opening key programs etc) of a native SSD. For normal use-cases you'd get much better performance allowing the drive itself to manage a small cache like that rather than trying to manage it yourself anyway.