No. RPCS3 (the PS3 emulator) does not require a BIOS file either. It uses an HLE (High Level Emulation) approach. No working PS3 emulator exists for Android at a playable state.
Mobox is a script that operates inside Termux to emulate x86_64 Linux environments. It is more complex than Winlator but offers slightly better compatibility for OpenGL titles. Xbox 360 Emulator Android Bios
You do not need a separate BIOS file for Xenia. Instead, you need the Xenia data folder containing the virtual NAND. Here is how to procure it: Xbox 360 Emulator Android Bios
