Hi. Something strange happens with the person who plays the role of Product Manager in Oracle XE,
they welcome us, they announce the availability of the XE product for Windows and Linux, they comment a few
posts and then, total silence(they will be very busy).
The only certainty here is that for the moment no official voice will respond (three days and a few hours
have elapsed from publishing your post), on the community side, we can only hope that those rumors will
20c is available, just for "preview", on some cloud environments (not all regions, AFAIK).
The image you posted specifically mentions that the expected release date for 20c XE is 2 weeks after ON PREMISE release, and that is something that did not happen yet, so no need to get anxious
For that same reason I reaffirm that we must wait.