Yes, this has been confirmed by the creator himself, Final Space has officially become a tax write-off by WB/D, after being removed from HBO Max, and digital platforms altogether.
Here’s the official statement from the creator of the show:

Although I never watched the show, imagine working on a show for many years, only for it to be washed away by a greedy CEO. Honestly, the fact that David Zaslav hasn’t been fired yet is beyond shocking.