What do you mean ? All my computer, I and suspect most ipv6 stacks updated in the last decade, assigns at least two address now by default, on linux, one showed

What do you mean ? All my computer, I and suspect most ipv6 stacks updated in the last decade, assigns at least two address now by default, on linux, one showed as global, assigned by router, typically static, and others temporary ones, random /64 and used by default for outbound connections.