I haven't found an option in 2019 for hiding the Home screen button.
If you really want to switch it off, I can describe how you can manually edit a workspace file to do that.
Can you explain how you can manually remove the Home button in the taskbar in your workspace? I am using the new CorelDRAW 2020.
OK, here's something without any screenshots. If you need more details, then please ask. This may be tedious, or it may be no big deal, depending on experience.
Of course, this is is something that you should experiment with first on a workspace file that you don't care about. You can also save a "safe" copy of settings.ini that you can go back to if you wish.
I just tried this, starting with a fresh default 2020 workspace, and it worked for me.
Note that this is not the only way to do this. There is another way that involves editing the Registry manually.