These are future plans and they lack specificity. I don't think they will come to fruition. The problem is that waste water from data centers isn't hot enough.
AtNorth's are under construction: https://www.atnorth.com/news/selected-group-will-utilize-sur... and https://www.atnorth.com/news/denmark-data-center-to-supply-h...
Microsoft's is operating: https://danskfjernvarme.dk/aktuelt/nyheder/2026/dataskyen-se... (I can't find an English source.)
"Will" means "in the future".
Even in the very sentence you quoted they are writing about plans to retire a coal plant by 2025 in future tense. This should be a very obvious hint that the text was written some time ago - unless, of course, the reader is not aware of what year we currently are living in.
In 2024, Fjernvarme Fyn reported ([1], page 19) they were recovering enough heat from that very site to heat almost 7000 homes in Odense and that the number can still rise significantly as the data center expands.
[1] https://stateofgreen.com/en/wp-content/uploads/2024/12/SoG_W...
But you can do your own searching, you seen determined that this doesn't exist.