I feel like more money would not have helped that much. Maybe it would have enabled a few of the devs to work on it full time, but I doubt it would have brought more people into the project.
I would indeed love the EU to step in but not in the way you are probably thinking.
I would rather see such effort being made unnecessary through a law forcing the manufacturers to provide enough information/specification or even code for alternative/after-market OSes to be viable on the devices they produced.
And also, if possible, mandate a degree of standardization (looking at you Android phones and ARM SBCs) enabling commonality of efforts when supporting a device class.