Founded in 2014, this Manchester-based developer has made games like 2016's Filthy Lucre on PS4 and 2017's The Lost Bear on PSVR.
You likely haven't heard of these niche games and that's no problem. You won't need to because Fabrik was acquired by Firesprite in 2021 to bolster their headcount. As Firesprite were purchased by Sony only a few weeks prior, Fabrik became a de-facto PS studio.
The indirect way Fabrik joined PS Studios is very unique, but not particularly surprising. Both Firesprite and Fabrik were founded by the same individual. Fabrik had also already supported Firesprite during their development of VR game The Persistence in 2018.
As Fabrik are only a support studio to Firesprite, they've not released a PS5 game. Nor should you expect them to barring unforeseen circumstances.
We'll indirectly hear from them whenever Firesprite announce their next game, which based on rumors, is a sequel to 2015's Until Dawn. The horror/interactive drama was remade in 2024 and included a new ending teasing Until Dawn 2.