Is there a nursery there? If not then your walk is irrelevant.
If there is a nursery, then is your route centred disproportionately on that nursery in a way that seems unusual to people familiar with that area? If not, then again your walk is irrelevant.
If there is a nursery, and your route is centred on it in a way that seems disproportionate and unusual to people familiar with that area, then however innocent you are you might now be seen as an adult behaving oddly near a nursery.
Still statistically highly likely to be innocent and harmless, and much much much more likely to be harmless because you're female, but some people might still choose to draw the attention of nursery staff to your behaviour (women can sometimes have strange obsessions with children too).
It's not black and white. The key point is that, with everything to do with precautions around children, we don't actually have to first rule out every single possible innocent explanation for behaviour that seems odd or out of place, before mentioning it to someone else. If the behaviour seems odd and unusual, and is something actual predators do, then that should be enough to make it worth noting.
If my dh or ds were in that position, just walking round and round innocently while a child settles, for instance, and another parent drew the attention of nursery staff to that behaviour because they thought it was suspicious and didn't recognise another parent, I wouldn't see that as a terrible outcome at all. I'd see it as informal social systems that protect children doing their job. I'd see it as a reassuring sign that an actual predator doing that one day might be noticed.