The biggest problem with these grants is that it is tax payer money that is then used to build private non open network monopolies.
Easiest solution would be what we have in Switzerland. If you want that government money, the fiber you lay needs to be accessible to any competitor otherwise you aren't getting any of it.
This is the only reason we have 25gbit symmetrical available for only around $70/month [1] because the fiber has to be available for anyone to use.
Recently the largest phone provider here tried to lay p2mp instead of p2p which would result in requiring splitters setting the max speed and features to what they define giving them a competitive advantage over anyone else. Luckily Init7 took them to court and they are now back peddling. Sadly that phone provider wasted an enormous amount of tax payers money and now need to undo the damage they did.