Last windows updated new bios 307 through system firmware under device manager. But in asus official website only 305 version is the latest.
I am sure microsoft will never produces bios for non microsoft surface devices.,, so the respective OEM has produced and uploaded their bios files to the windows update database server . Hence while updating windows updates to devices , windows try to install new bios after detecting compatible bios to the oem devices.
I am using R542UQ-DM153 , currently with x542UQ.307 bios . without single problems. I always update bios from microsoft windows updates
Intel i5 7200U_ Nvidia 940MX _Windows_11_Enterprise_64bit_22H2_buildno_22621.754