Your SSHD is a SATA drive, so there should be no problem going to 2TB and beyond, as long as your new drive physically fits the space inside your laptop. The data and power connectors should be completely standard, the thickness of the drive is the main thing to check (width and length are pretty much standard for 2.5-inch drives). If you get the model number of your existing drive (the Windows properties should show it), something like ST1000LX015, and search for it on https://www.seagate.com/, you should be able to find the spec sheet with physical dimensions. A Seagate ST2000LX001 is probably roughly the same as your current drive, just in 2TB capacity.
One thing to consider is that SSHDs are kinda becoming obsolete. You may be better getting a 2TB SATA 2.5-inch SSD instead, e.g. a Seagate Firecuda 120 such as ZA2000GM10011. A 2.5-inch SSD should significantly outperform a SSHD under sustained heavy load, and is essentially immune to physical shock damage compared to a spinning disk. Obviously, cost may be a factor in that decision. You don't have to stick to Seagate, any good SATA 2.5-inch drive should work, but the Seagate Firecuda range are higher performance than some more basic drives out there..