I think the Victron inverters can handle micro inverters if they support the sunspec protocol (I think Hoymiles do a little)
The problem is not if you can to this but if it makes sense. If you have micro inverters then it all is in AC, but you have many smaller inverters and they all sit outside in the weather. And the nasty is if you need backup power they do not work. Now if you think of adding another backup power inverter you now how another inverter meaning you have all the extra cost. I had the same thoughts.
In then end it is way cheaper just to buy the Victron that has power backup.