Erm, where are you getting this information? Most countries, if they've expressed a view on the issue, support Guaido, including essentially the entire EU:
Though I can't say no member states recognize him, the sources on Wikipedia are largely tweets and I'm not sure how up to date they are, the EU as a whole has retracted their support for him as interim president.
The difference is that further elections & governmental procedure occurred in Venezuela and the EU is simply updating their recognition in light of that. They aren't timidly walking back their earlier recognition as if they were caught supporting the wrong guy.
https://www.euronews.com/2021/01/07/eu-no-longer-recognises-...