Installed "emulators" successfully but not appear in "supported"

[SourLemonJuice]

Device

Orange Pi RV2 RISC-V CPU want to run amd64 arch.

Details

After running the:

$ sudo docker run --privileged --rm tonistiigi/binfmt:latest --install amd64
{
  "supported": [
    "linux/riscv64"
  ],
  "emulators": [
    "python3.12",
    "qemu-x86_64"
  ]
}

the new qemu-x86_64 emulators will appear in the results but the supported field will only have a single linux/riscv64.
But when I restart the systemd-binfmt.service, all the new emulators will gone:

sudo systemctl restart systemd-binfmt.service

I tried to install QEMU from the distro package manager, like #169:

sudo apt install qemu-user qemu-user-binfmt

It will give me more "emulators" permanently but still no more in "supported".

Run containers

I originally planned to run Jellyfin, but tested it in the Alpine base image:

Without any emulators:

$ sudo docker run --rm -it --platform linux/amd64 alpine
exec /bin/sh: exec format error

Have emulators, no supported in results:

# return nothing
$ sudo docker run --rm -it --platform linux/amd64 alpine