Please bump app-crypt/yubikey-manager to 4.0.0 (or whatever version will be current at the time of bump). Version 4.0.0 brings ability to manage token OpenPGP feature that has KDF enabled. Previously, yubikey-manager would try to verify a KDF PIN as a plaintext one, which would be treated by the token as a wrong PIN. This could easily result in PIN tries exhaustion.
commit b27a47f5a8b4e879d914cef3020302556602d09a Author: Göktürk Yüksek <gokturk@gentoo.org> Date: Sun Mar 14 15:39:28 2021 -0400 app-crypt/yubikey-manager: bump to 4.0.0 Package-Manager: Portage-3.0.13, Repoman-3.0.2 Signed-off-by: Göktürk Yüksek <gokturk@gentoo.org>