VO2max calculation when pushing a stroller

Hello,

I wonder if the VO2max estimation on my venu3 is reliable when I am pushing a stroller, which I do on most of my walks.
The ratio between pace and intensity/heartrate which I think is a key factor in calculation VO2max cannot be the same compared to a walk without a stroller.

I am thinking of creating/copying a new activity to prevent wrong VO2max calculations.

What do you think? Are my assumptions correct?

Thank you in advance!