为什么 Git 说我绕过了“提交必须有有效签名”的规则，即使我的提交是由 GNUPG 签名的？

Question

所以今天我在我团队的 GitHub 存储库中添加了一条规则，即每个提交都必须具有有效签名。我安装了 GPG 来签署我的提交，但是当我将我的提交推送到 GitHub 存储库时，它一直说我绕过了该规则。但是当我添加标志

--signed

时，GitHub repo不接受它。这是我在没有

--signed

的情况下推送时的输出：

C:\Users\Family\Parkour>git add .

C:\Users\Family\Parkour>git ci -S -m "firstcommit"
[main fefd3e6] firstcommit
 6 files changed, 2 insertions(+), 856 deletions(-)
 delete mode 100644 notshowingfiles
 delete mode 100644 notshowingfiles

C:\Users\Family\Parkour>git push
Enumerating objects: 19, done.
Counting objects: 100% (19/19), done.
Delta compression using up to 4 threads
Compressing objects: 100% (10/10), done.
Writing objects: 100% (10/10), 1.39 KiB | 236.00 KiB/s, done.
Total 10 (delta 9), reused 0 (delta 0), pack-reused 0
remote: Resolving deltas: 100% (9/9), completed with 9 local objects.
remote: Bypassed rule violations for refs/heads/main:
remote:
remote: - Commits must have valid signatures.
remote:
To https://github.com/team/game.git
   67ef523..fefd3e6  main -> main

这是我用

--signed

推送时的输出

C:\Users\Family\Parkour>git add .
warning: in the working copy of 'notshowingfiles', LF will be replaced by CRLF the next time Git touches it

C:\Users\TheUser\Parkour>git ci -S -m "secondcommit"
[main 946458c] secondcommit
 9 files changed, 1695 insertions(+), 853 deletions(-)
 create mode 100644 notshowingfiles
 create mode 100644 notshowingfiles

C:\Users\TheUser\Parkour>git push --signed
fatal: the receiving end does not support --signed push
fatal: the remote end hung up unexpectedly
error: failed to push some refs to 'https://github.com/team/game.git'

（删除了一些东西）

GitHub不支持GPG，还是我哪里搞错了？