There are 2 different Lightroom apps.
The latest version of the app previously known as Lightroom is now called Lightroom Classic. That's the one with the modules at the top.
The one you've downloaded in a new cloud-native app. It's newer, simpler, and makes your photos available on multiple different devices via the cloud, but it doesn't have the full feature set of the old Lightroom app.
So, this might help you decide which you need: https://www.lightroomqueen.com/lightroom-cc-vs-classic-features/
HSL is in Lightroom CC. If you open the Edit sliders, there's a small color wheel icon in the Color panel.
Oh that's right! So basically CC is just a simplified version without all the bells and whistles of LR Classic. That's a bummer because I just made the monthly subscription for the CC version thinking it's newer and more up to date. BOOO!! Adobe should change the damn name. How confusing! I checked out the Classic last night and it's way better. The CC version doesn't have anything really useful.
kymt, you should call Adobe and ask for your license to be transferred back to the normal photography subscription. You're not the first one that this has happened too.