Warranty and “checks”

I have carried out at the dealer the four free checks on my 2021 Prime. Two require oil and filter change, while the other two, in between, are “checks”.
I have only 21k miles and 70% of those are in some form of EV mode (either in EV mode or in HV). Essentially the ICE is hardly used.
Now, according to the service plan, I am supposed to do another “check” service after 6 months from the last “big one” at the two year mark. Essentially I have to go to waste money for them to check levels.
If I skip this “check” and instead take the car in for the 3-year “big” service, due early next year, is my warranty void?
I check regularly by myself oil and coolant/brakes fluid levels, especially before longer trips.
When I lived in Europe I had to bring in the car only once a year or after 7.5k miles. (Considering the smaller distances, that happened about once a year too.)

 

Thank you. This is quite different in Europe. AFAIK, during the warranty period in EU, if you miss a scheduled maintenance or an oil change, as required by the manufacturer, and the warranty is void.
But at least the maintenance plan doesn’t require you to go every six months to give money to a $tealer for “checks”.