Yes, toy poodles can be left alone. The general rule is that toy poodles can be left alone for one hour per month of age.
For example, a two month old can only be left alone for up to two hours. Full grown dogs can typically only be left alone for 8–9 hours before they need to go to the bathroom.
While toy poodles are an affectionate breed and prefer to be in the company of others, they can be left alone for as long as they can stand without needing to go to the bathroom.
With that said, some toy poodles feel separation anxiety even if they’re old enough to be left alone.
To help make your pet feel more comfortable when you’re gone, make the environment comfortable. Keep the lights on, leave some toys out so they can play, and consider playing some quiet music.