2 under 2 stroller options

When our daughter will be born, our son will be just turning 2 and I know I’ll benefit from a double stroller. We have the Nuna Mixx2 and the Nuna Pipa Lite LX car seat to pair with it. I want a double stroller that the Nuna car seat can fit or adapt to. I was thinking maybe selling my Nuna Mixx 2 and buying the Demi Grow by Nuna. Unless anyone knows of a cheaper option of a double stroller that will fit the Nuna car seat on it.