It depends on whether your role in the company means that you are part of negotiating the deal. If you are the CEO: then probably yes. If you're an IC engineer: then probably not.
Relatedly, most of these deal terms are pretty standardized. In the vast majority of cases there aren't a lot of negotiations around liquidation preferences, only negotiations around valuations. The exceptions to the rule tend to happen for very large or late stage fundraises.
as an employee (non-founder) do you have a say in liquidation preferences of future rounds of investment?