this is a feature that has been asked for a long time.
2 workarounds.
do your tracking on a null and your roto on a solid, then parent the solid to the null, and use the sold as a track matte.
option 2 is if you want to apply trackers to the individual mask points.
there is a script out there (you could probably find it if you search here even) that will do just that.
who is that masked man…
https://www.exposedideas.com/