If LaunchBar is set to index Reminders, it should. I only have one list on my machine but I can add items to it like so:
1. Bring up Reminders in LB
2. Right arrow to show individual lists
3. Select list and press the space bar
When you press the spacebar, LB turns into a text entry field you can use to add an item to that list. You might be able to omit the first step by just searching for a specific list and pressing the space bar.
1. Bring up Reminders in LB
2. Right arrow to show individual lists
3. Select list and press the space bar
When you press the spacebar, LB turns into a text entry field you can use to add an item to that list. You might be able to omit the first step by just searching for a specific list and pressing the space bar.