Technically not, as MBR "legacy" boot just loads the first sector (MBR) of the selected boot device into memory and jumps to it, and BIOSes with Int13 Extension

Technically not, as MBR "legacy" boot just loads the first sector (MBR) of the selected boot device into memory and jumps to it, and BIOSes with Int13 Extensions (mid-90s!) already allowed accessing disks with up to 2^64 sectors. There's also "MBR the partitioning scheme", which does have a limit of 2^32 sectors or 2TB, but that's not exactly the same as "MBR the boot method".