I am getting this error for:

nerdctl push rep_name/order-saga

INFO[0000] pushing as a reduced-platform image (application/vnd.docker.distribution.manifest.v2+json, sha256:3b1208939a7ef78e70376c2a0445cf86eedd1a929c8242b9de58894b5149620f) 
manifest-sha256:3b1208939a7ef78e70376c2a0445cf86eedd1a929c8242b9de58894b5149620f: waiting        |--------------------------------------| 
config-sha256:b8998e7a09ce31b3e677df1a18b647f5eccb4729a7fb323612ccbe7d3eaf39da:   waiting        |--------------------------------------| 
elapsed: 1.2 s                                                                    total:   0.0 B (0.0 B/s)                                         
FATA[0001] server message: insufficient_scope: authorization failed

FATA[0001] server message: insufficient_scope: authorization failed

This seems to say that whatever credentials you are using to authenticate against your container registry don't have the necessary permissions to push your container. What does your setup look like? Is this a possibility?