can `nsenter` rootless network namespace without root?

[springzfx]

nsenter require root to enter a namespace, even through the target namespace is a rootless network namespace.
The readme do not indicate this issue. Is there way to bypass this?

[AkihiroSuda]

nsenter -U

[AkihiroSuda]

with --preserve-credentials, maybe
https://man7.org/linux/man-pages/man1/nsenter.1.html