I think you're asking the baby-whisperer-lady, but my two cents for what it's worth: I've have two catnapping babies. The first one, I tried everything under the sun to get him to sleep more than one sleep cycle. Nothing worked (except for very limited success with a dummy) and I thought he'd be ruined for life

Of course, he grew up, at about age one when he dropped to one nap a day and started sleeping much longer.
Number two is also a catnapper. This time, I'm not stressing. She can sleep in 45-minute blocks if she wants. It's a much more pleasant experience, and I know she'll grow out of it with time. So if baby is happy and you're happy, do remember that chosing not to worry is a valid option