What is Version 6 UUID?

A Universally Unique Identifier (UUID) is a 128-bit number/tag used for computer data storage, transfer etc. UUID version 6, reordered time UUIDs are a new format of UUID. Version 6 UUIDs solve two problems that have long existed with the use of version 1 UUIDs:

• Scattered database records
• Inability to sort by an identifier in a meaningful way (i.e., insert order)

To overcome these issues, we need the ability to generate UUIDs that are monotonically increasing while still providing all the benefits of version 1 UUIDs.
Version 6 UUIDs do this by storing the time in standard byte order, instead of breaking it up and rearranging the time bytes, according to the RFC 4122 definition. All other fields remain the same, and the version maintains its position, according to RFC 4122.

In all other ways, version 6 UUIDs function like version 1 UUIDs.

Reference :- https://uuid.ramsey.dev/en/stable/rfc4122/version6.html#rfc4122-version6