How to docker pull architecture and username

Let’s say:
Docker hub username: user1
Docker hub repo: app2
Version: 3

Command would be: docker pull user1/app2:3
This works.

It is possible to force Docker to pull a certain architecture. E.g. docker pull arm32v6/alpine:3.10 This works.

How to combine these two?

Expected: docker pull arm32v6/user1/app2:3
Not working.

Alternative: docker pull user1/arm32v6/app2:3
Also not working.

Bump in this dead forum