Multi-region inventory (US + EU), Magento native?

Yes, via Magento Multi-Source Inventory (MSI), native since 2.3.0.

Architecture: define sources (warehouses + retail stores + drop-ship vendors) per region (e.g. us_dc_kentucky, us_store_denver, eu_dc_netherlands, eu_store_munich) and stocks per region (US stock includes US sources, EU stock includes EU sources, etc.). Customer geo-routes to a stock; stock aggregates inventory; cart shows accurate availability per region.

Source-selection algorithms decide which warehouse / store fulfils each line item. For sporting goods this matters because a single team-uniform order can split-ship from 2 sources if the size is in DC but the personalization-ready blank is at the embroidery partner, the algorithm decides whether to split-ship (faster) or wait-ship from one source (cheaper).

Multi-region pricing + currency: separate store views per region. EU store view in EUR with VAT-included prices; US in USD with tax-excluded; UK in GBP with post-Brexit duty handling. Same SKUs, different price visibility, different checkout (Klarna in EU, Affirm in US, Clearpay in UK). Different drop-ship partners per region (Sendle in AU, Royal Mail in UK, FedEx in US).

Sporting-goods specific gotcha: ski + winter sports inventory must be region-locked, you can’t cross-ship a ski from EU to US in October because both regions need it for first-snow. Source-selection rules pin certain SKU categories to in-region only during peak windows.