BIOS and Amiga should not be used in the same paragraph!
Yes there were some ECS A500/2000 produced, though with 1MB Chip. A machine does not need 2MB to qualify it as a ECS machine! They had Green power leds, 1MB Chip, ECS Agnus and some had the ECS denise. I had one of these Rev 6.1 A2000s but mine did not have the ECS denise, I bought it and installed it, but was disappointed at the new resolutions in old 4 colors. I wanted AGA at that point!
