Extended Sick & Safe Leave Policy

I'm in an area that is implementing a sick & safe leave law that requires employers give 12 weeks leave to employees. We like to play by the rules, but we are concerned about how to navigate this if our nanny ends up taking an extended leave. This is very much a possibility for us as our nanny may have children in the future, but she has mentioned wanting to continue nannying. Has anybody experienced this? If so, have you found good fill-in care during extended leaves?

Added info: We are in Minnesota. There is no exemption for employer size. It is fully paid leave, but I believe the paycheck actually comes from the government. The employer has to pay an additional percentage when paying taxes, which can be split with the employee.

Link to program I'm referring to: https://mn.gov/deed/paidleave/employees/