SCPH-70004 models usually have BIOS v1.20 or v2.00. The filename you wrote suggests a v1.20 dump.
: BIOS files are copyrighted intellectual property of Sony Interactive Entertainment. Distributing or downloading these files from third-party websites is generally considered software piracy. The "Dumping" Method scph70004biosv12eur200bin link
Sony has not released any official BIOS files for emulation, nor are they likely to. The company occasionally repurposes PS2 tech in PS Plus Premium’s cloud streaming, but that offers no downloadable BIOS. SCPH-70004 models usually have BIOS v1