'13 Passat (USA) Timing Belt and related maintenance?

I have a 2013 Passat that just crossed over 116k miles. I know we're due for a timing belt but I'm curious what other maintenance I should ask for while it's in the shop having that done. I think I remember hearing the water pump should usually be replaced? DSG service?

In addition I want to consider having the DEF/DPF/EGR system removed and a basic tune. This is a daily driver and I want it to last a while, if I could get a few more MPGs that would be nice.

I don't have the expertise or access to the tools and facilities needed for this sort of thing so I need to hire it out.

So this ask is: what should I have done to keep this baby going well past 200,000 miles? and how much should I expect to pay for this kid of work (I understand this varies regionally I'm in the midwest, feel free to mention where you're pricing from)