Invalid file format when importing arm64 image

English Container & Virtualization
1

I have created a docker image on Windows 11 with the following commands:

docker buildx build -t myimage --platform linux/arm64 .
docker save myimage --platform linux/arm64 | gzip > m.tgz

I assume it should be importable to my QNAP but it asserts “Invalid File Format”. I as well tried the .tar archive, same result

Any idea?

QNAP TS-233
Container Station Version 3.0.9.1038 (2024/11/08)