If so, go to Window > Tabs > Parameters, and dock it where you want it. If that is not the problem, please post a screenshot.
What Layout are you using? Window > Workspace > Select Layout, perhaps changing that may help.
This probably isn’t it, but just in case: note that the context menu icon can appear on either the right OR the left side, for example if you have it docked vs. undocked. I thought I lost it once briefly because I was too used to looking in the same place and didn’t notice it had moved.