I don't know if the picture will show so I will describe. I don't know if my 2019 Wildwood has a bypass valve on the hot water heater. There are two valves. One on the cold line and one on...
Yep = looks like a simple two valve system. As Jim said, turning the valve on the cold line will send it 'up the tube instead of into the tank and turning the valve on the hot line will receive that water and directed back out the hot line. Definitely a bypass system there. Some plier might give you a bit of leverage on the valves without feeling like you are going to break something.