The rebrand came at a time when "Facebook" was mainly associated with either tremendous scandal (Facebook Files, ad fraud, Cambridge Analytica, Rohingya and Tigray genocides, etc.) or a social media platform increasingly dominated by the elderly.
I think it was a desperate lunge away from that toxic brand toward ANYTHING else. Zuckerberg put his money on VR, given the pandemic and the mild success of Oculus.
Betting big on the metaverse in particular was a mistake, but it might have helped keep the Facebook stink off of products like WhatsApp and Instagram, which remain pretty popular among mainstream audiences.