If Nintendo plays their cards right, then yes, it absolutely can.
However, that would require no replacement until holiday 2023 or later, and strong software support up until that point.
We have strong software support coming in 2022, and a replacement late 2023 seems possible (Even if I think it will come earlier in 2023).
So, yeah, it can outsell the DS. It won't if Nintendo screws it up, what I don't think they will.