Too sleepy?

So we've been aiming for 4 hours minimum of free roam time (the goal is to get to at least 6!) but my babes come out and are soooo sleepy. They are eating well, drinking well, going potty without any issues and they DO play but not for very long and not very wild like some. Admittedly, they are 3 and 4 years old so maybe they're just beyond that phase?

Should I be concerned with them coming out and mostly sleeping? Does it still count as free roam if they're not roaming 😅

Thanks in advance, pics of cute sleepy babies