Qualcomm SBL UEFI?

Hello. I have a phone with an MSM8909 (Qualcomm Snapdragon 212) SoC. I ported EDK2 UEFI to it and it works. But it uses SBL instead of XBL. I found a file named sbl1.mbn among the Stock ROM files of the device. There was an article in it that it was an ELF file and mentioned UEFI. Does SBL have UEFI bootloader like XBL? Thanks.