Yes, You can add items from Target or sync an existing Target registry directly into your MyRegistry.com account.
On Desktop:
Log in and go to your My Gifts page. Click “Things To Do” at the top, then select “Sync/Link Store Gift Lists.”
On Mobile/App:
Tap the Menu (three horizontal lines) in the bottom right corner. Select “Things To Do,” then scroll down and tap “Sync Store Registries.”