Microsoft has today responded to the news of a cancelled PS5 version of Redfall by saying it hasn't "pulled any games from PlayStation". In fact, the platform holder thinks it's actually "expanded our footprint of games that we've shipped on Sony's PlayStation since our acquisition of ZeniMax, and the first two games we shipped after closing were PlayStation 5 exclusives". This is in reference to Deathloop and Ghostwire: Tokyo.
The statement provided to Eurogamer then goes on to discuss how Microsoft hasn't pulled any pre-existing Bethesda games available on PS5, PS4 since the Bethesda takeover, and that content updates have continued to arrive for PS5 and PS4 systems.