Is giving my daughter (20months) “quiet and alone time for 60 min” bad thing?

I have an almost 20months old daughter who recently stopped taking nap in the morning.

However, since she’s still so used to an old schedule(wake up at 6am and morning nap at 8) , she gets fussy and tired by 11 o’clock.

So I still put her in crib and have her rest at 8 o’clock. She sometimes sleeps but now most of the time she’s just hanging out( like singing or talking)

I started wondering if leaving her like this is bad for her development.

If she refused or crying to be in her crib, I wouldn’t do it but she’s totally fine with it.

What is your thought on this?

PS Napping at 11 o’clock does not really fit her activities schedule either.... I want her to be awake till noon at least and take a nap afterwards.