Brands treat marketplace expansion as a marketing decision and then lose a quarter to operational problems nobody scoped.
The realistic sequence: catalogue data audit against the target marketplace required attributes, fulfilment method decision and shipping template setup, pricing and repricing rules that account for different fee structures, and only then listing creation and advertising.
Our fastest compliant launch was eleven weeks from kickoff to profitable. The ones that take nine months are almost always the ones where listings went live before the catalogue data was ready.