A floor waste is a requirement in the shower area, but it would depend on your bathroom design if you need an additional floor drain outside that.
You will need to check with the plumbing compliance regulations in your state.
There are options for you to choose a bath or basin with overflows, and that could possibly be an alternative to an additional floor drain.
In the end, you can choose to only have the minimum requirements of drainage in your bathroom, but they are there to moderate the risk of overflowing water into other areas of your home.