Crate training – day and night?

So I’ve only really known crate training to be done for night time – not during the day. We have a playpen with some toys and a pee pad and the crate open during the day and she is in there when I need to get stuff done or if my toddler is being hyper. We have some toddler classes in the morning which last 1.5 hours max. I was going to leave her with the crate open and her having access to the playpen for this time when we’re out, and have her in the crate closed at nighttime. Does this sound ok? Or should she be in the crate while we are out?