is there any way to do this?
I know someone wrote to use keytrackers/velocity trackers and dummy samples but i wasn’t sure what that meant in relation to this! 
As far as I know the only method of automating instruments in the instruments editor is with the macro knobs .
In the phrase editor you can only use the sample commands .
Unless I am wrong ofcourse
I know someone wrote to use keytrackers/velocity trackers and dummy samples
Yep, that would have been me 
I posted a proper response in in the tips & tricks section:
https://forum.renoise.com/t/internal-phrase-automation-in-renoise-or-redux/48113