The Libra/Diem project of FaceBook was dead even before it could be launched. Rather than a cryptocurrency, it was more similar to the CBDC coins so I am not much worried about its demise.
Actually, the first version of Libra was very interesting: a "world currency" with a constant purchasing power measured against a basket of currencies and commodities (gold included).
This would have been really interesting, but, as you guess, the government could allow FB to get so important, so they killed it even before it was born (I guess witch threat they made to Zuck in that closed room to convince him it wasn't a so important idea to develop, after all.