Right, I will eat both of my shoes before meta will actually fully, in all honesty, implement this even just for whole EU.
Valuation of this company would drop to 10% immediately. We all know about shadow accounts of folks that never had any meta/related account. We know they fight extremely hard with users who want to quit their platforms (my wife had to wait 12 months logged off on any service, otherwise countdown would be restarted from 0).
Unless meta will allow full audit of all codebases and all DBs by EU inspectors, that simply ain't happening, they lied many times before and it won't be different now, their very existence and massive wealth is based on this.