Where does RStudio install Keras without Miniconda?

I have an existing Miniconda installation on my computer.

On RStudio, I want to install Keras and so I ran the following lines

install.packages(“keras”)
install_keras()

In the console, I was asked if I want to install Miniconda. I chose No because I already had it installed. The Keras installation proceeded successfully for RStudio.

However, I cannot find the Keras package on my existing Miniconda.

Should I have chosen Yes to install Miniconda during the Keras installation process, even if I already have it installed?

Where did RStudio install Keras without Miniconda?