Probably because Wendelstein 7-X is making progress at a far faster rate than the ITER model has the current goal, without accounting for delays, for a 2050+ delivery time for the PROTO reactor.
when a scientist tells you 2050+ it means they don't know and everything is being made up as they go along. It means 'outside the realm of any realistic estimate, but close enough to feel tempting so you don't immediately remove funding'.
One project started in 2007 planning activation in 2025 and planning reactions in 2035. The other started in 2015, activated 2017 and steady state reactions have been delayed from the original Sept 2021 plan to 2022. It's not even close the results so far.