Tenant moving out and not letting me show the house

[Isaac B.]

Hi, I have a tenant who just gave her 30-day notice to leave the rental. I told her that I'd let her know in advance when a candidate tenant wants to come see the house. Her response was no, she is not going to allow any showings (her reason is Coronavirus health hazard from strangers). She even said I, myself (the landlord), cannot go see the house to assess its condition until after she's moved out. 

Do I really wait to show the house until she's moved out? Obviously this is going to push out when the next tenant will be move in quite a bit, and will for sure extend a time gap in between tenant occupancies...which just equals losing $$$