Nah that's typical I think. If I'm biking a longer way I have to force myself to eat some around like 35 to 40 miles, and then every 15 or 20 after. I don't feel hungry but I start getting noticably weaker.
In fact, when building up for distance cycling, I felt like learning when to eat and making my saddle and handlebars more comfortable was equally as important as building strength. Extra strength makes you finish your trip faster, but you'll probably still complete it even slowly, but if your saddle isn't right for you, the pain can be insurmountable.
When I'm going on a trip I pack like a light lunch (cheese sandwich and chips or fruit) and stop, but if I'll be back home that day I go for the type of stuff you get at a bike shop, cliff bar or those weird but kinda good energy gummis with electrolytes sugar and a little caffeine and just snack as I ride.
In fact, when building up for distance cycling, I felt like learning when to eat and making my saddle and handlebars more comfortable was equally as important as building strength. Extra strength makes you finish your trip faster, but you'll probably still complete it even slowly, but if your saddle isn't right for you, the pain can be insurmountable.