What are the Good Practices project parameters in SSIS (SQL) solutions

My question is not something concrete with an error in the X code. Rather, I would like to know if there are popularly known good practices when configuring the parameters in an SSIS project / solution. For example, if apart from parameterizing folder paths of inputs and outputs or connections, it is also common to put analysis dates or perhaps the dates fit better as a variable.

On the other hand, let’s say that in a certain environment I just found that the parameters of a set of SSIS packages instead of being configured as project parameters are in an SQL table and that is where they are modified. Is this normal or is it recommended to save as parameters?