How long to leave alone at 14 weeks?

Hi all !

I am bringing home a new puppy and will take a week off work to adjust her and then will WFH for another week while she is settling in but I was curious if it would be okay to leave her alone for one day when I go into the office? I live in a high rise in NYC and she will be a relatively small pup so my main priority is to pad train her (in this case I bought grass-like pads) so she can do her business when I am not home but I am anxious thinking about if she will be okay. Any advice?