`git remote show <name>…​` does not show all branches capable of `git push` when `push.default=upstream` and behaves as if `push.default=simple`

Thank you for filling out a Git bug report! Please answer the following questions to help us understand your issue.

What did you do before the bug happened? (Steps to reproduce your issue)

cd '/'; cd '/'; rm --force --recursive -- './test_git'; mkdir "$_"; cd "$_"; mkdir --parents -- './server' './client'; git -C './server' init --bare './repo.git' branch_default_path="$(git -C './server/repo.git' symbolic-ref HEAD)" branch_default_name="${branch_default_path#'refs/heads/'}" git --git-dir='./server/repo.git' --work-tree='.' commit --allow-empty -m "$((++number))"

git -C './client' init './repo' git -C './client/repo' remote add server 'file://'"$(realpath './server/repo.git')" git -C './client/repo' config list --local --show-scope --show-origin git -C './client/repo' branch --list --all --verbose --verbose git -C './client/repo' remote --verbose show server

git -C './client/repo' fetch --all git -C './client/repo' branch --list --all --verbose --verbose git -C './client/repo' remote --verbose show server

git -C './client/repo' checkout "$branch_default_name" git -C './client/repo' checkout -b "$branch_default_name"1 server/"$branch_default_name" git -C './client/repo' checkout -b "$branch_default_name"2 server/"$branch_default_name" git -C './client/repo' config list --local --show-scope --show-origin git -C './client/repo' branch --list --all --verbose --verbose

git -C './client/repo' checkout "$branch_default_name"; git -C './client/repo' push git -C './client/repo' checkout "$branch_default_name"1; git -C './client/repo' push git -C './client/repo' checkout "$branch_default_name"2; git -C './client/repo' push git -C './client/repo' remote --verbose show server

git -C './client/repo' config set --local 'push.default' 'upstream' git -C './client/repo' checkout "$branch_default_name"; git -C './client/repo' push git -C './client/repo' checkout "$branch_default_name"1; git -C './client/repo' push git -C './client/repo' checkout "$branch_default_name"2; git -C './client/repo' push git -C './client/repo' remote --verbose show server

What did you expect to happen? (Expected behavior)

The last `git -C './client/repo' remote --verbose show server` outputs:
  Local ref configured for 'git push':
    main pushes to main (up to date)
    main1 pushes to main (up to date)
    main2 pushes to main (up to date)

What happened instead? (Actual behavior)

The last `git -C './client/repo' remote --verbose show server` outputs:
  Local ref configured for 'git push':
    main pushes to main (up to date)

What's different between what you expected and what actually happened?

Anything else you want to add:

Please review the rest of the bug report below. You can delete any lines you don't wish to share.

[System Info]
git version:
git version 2.46.0.windows.1
cpu: x86_64
built from commit: 2e6a859ffc0471f60f79c1256f766042b0d5d17d
sizeof-long: 4
sizeof-size_t: 8
shell-path: D:/git-sdk-64-build-installers/usr/bin/sh
feature: fsmonitor--daemon
libcurl: 8.9.0
OpenSSL: OpenSSL 3.2.2 4 Jun 2024
zlib: 1.3.1
uname: Windows 10.0 22631
compiler info: gnuc: 14.1
libc info: no libc information available
$SHELL (typically, interactive shell): C:\Program Files\Git\usr\bin\bash.exe

[Enabled Hooks] not run from a git repository - no hooks to show