I think it’s normal to an extent however complete absence of enjoyment could also be a sign of depression as others have pointed out.
The fact that you have specific scenarios that used to elicit joy is good; try to remember those and focus on those situations next time you experience them. You may just brush it off as a pointless exercise or you may find that you’re able to relive some of those feelings.
I believe there is a lot of power in just stopping to sniff the roses as they say. Taking momentary breaks to just be in the present moment, or think about how you’re feeling.