In centers - Do they assign “primary caregivers” to each infant (this is recommended so one caregiver gets to know the babies needs and so the baby has consistency)
How often do they take the infants outside? How? (Stroller walks? do they take them out of the stroller ever to just be outside? It can be kind of depressing if you realize post baby that your baby is never getting fresh air during the day and it can be kind of common in centers) my experience is tbag they often say “oh yes of course” if you just say do they go outside? So be specific - how many times a day, what weather. You can get a better sense then.
Things to look for in centers - do teachers look happy? Are there a ton of babies in one room? (Less is ideal) Is the room loud, busy (some babies will be fine with this but some will do a lot better in a more calm place).
How often are babies put in devices? How long do they stay in them, are there any rules about max time? Almost all daycares will use these sometimes but pay attention to how many “holding” devices like swings etc there are and how many babies are in them. Short periods is ok but some use them far too much. In the center we started in you would always see babies in them, at our current home daycare I would say one day a week I arrive at pick up and a baby is in one but the vast majority of the time baby is on their back on the floor with a blanket or being held (both of which are much preferable for development)
I wish I knew how much naps would rule my life post baby - ideally look for a spot that has a separate napping area (more common in home daycares). And ask about flexibility with naps - at what age do the babies join the schedule of the older kids (if in a home daycare with mixed age) and at what age do they drop kids to one nap usually (this applies to both center and home) - most daycares seem to drop kids to one nap at 1 year though in my experience some (many) kids often aren’t really ready til later for that - will the child be able to take a nap in the morning after 1 if they still need it?
I know that was a lot and you don’t have to ask every single one, some you can just keep your eye out for but they are some things to look for in terms of quality