I'm so sorry for the loss of your mom. Especially during these already stressful times. Prayers for your family.
My dad passed away 11 months ago. He always wanted to be cremated and wanted no funeral, etc. My sister and I hadn't listened to him in a long time, we were not going to start now.
Once we knew that dad was not going to make it, we made arrangements. We had him cremated and would have a mass/lunch later to accommodate our out of town family.
I kept dad's ashes in my apartment, a little weird at first, but my nephew who lived below me, would come up and we would have dinner, etc., with him. Really weird, I know.
Dad died May 4, we had a mass & lunch in June. We had his ashes interred a few weeks later, just immediate family; 6 of us.
This is such a crazy time. I can't believe the added stress you have to deal with not being able to give her a proper burial at this time. As your mom is cremated, there isn't a rush to get her buried. If you have siblings, nephews/nieces, children, I think I would wait to have her buried so everyone can be together. I would also take her ashes home where she is probably safer.
Again, my condolences.