Warning: Do not attempt to install an update from a different region (e.g., EUR or JPN) with a US base game. Update IDs must match. Look for 01004A20C0B6800 (US Title ID).
The DLC for the US region includes:
The keyword emphasizes —and for good reason. The Nintendo Switch is notorious for region-specific title IDs. A European (EUR) version of Sonic Frontiers will have a different Base ID (starts with 01004A20... but often variant). sonic frontiers switch nsp xci dlc update us