e-bike might be the thing. Though for me, I grew up riding in a pretty flat part of the state on 30 and 40 some odd pound bicycles. Never a issue until I moved to a part of the state where the terrain is constantly rolling.
Two things help me climb without being worn out at the end of the ride. A relatively light bike, and being able to spin 80 RPM as a matter of course whether going up hill or any other time.
Even when I recently went from a 22.5 pound bike to a <18 pound bike, I actually would be riding and then start wondering where those hill were that use to give me trouble on the other bike. And my new bike only had a low of 36/30 where the previous bike had a lower 36/32. Weight makes a big difference in rolling terrain and hills.