What Steam confirms
The official app metadata lists Windows, online PvP, online co-op and cross-platform multiplayer. It also lists achievements, stats and Family Sharing.
Why PS5 searches are not proof
Google autocomplete includes PS5 and PS5 release-date queries, which demonstrates demand rather than an announcement. A console launch should be verified through Crytivo, Beer Night Studio or a platform holder.
Check the live requirements
The checked minimum requirements include 16 GB RAM, a GTX 1060-class GPU and 16 GB of storage. Steam recommends a microphone because communication is important to the game loop.