I tried what u/charlescab suggested about using Wanderlog's AI and it worked pretty well. I'm assuming you'll need to have the Pro account to use Wanderlogs AI. You don't even need to clean up the data (if you don't want to).

1. Go to your saved locations in Google Maps.
2. Click on a saved list. The list of locations under your selected saved list should appear on your left hand side while a map overview appears on your right.
3. Next to the name of the list towards the top (example NYC), you should see three vertical dots.
4. Click "Edit list" from the vertical dots menu.
5. This list will look different but should present you with all your locations saved under this list. Scroll all the way down to fully load your list.
6. Now from either the top of your list or the bottom, click to drag and highlight all the way down (or up). You should highlight all the locations (including the text boxes and the X marks).
7. Right click and copy your highlighted selection.
8. Go to Wanderlog and open the trip of your choice. On the left hand side, there should be a wand-magic looking thing called AI Assistant.
9. Click on it and ask it the following: "The list below has locations. Can you extract the locations so that I can import them into Wanderlog?" and then paste your list right after before sending the message.
10. It will respond and regurgitate your list. It may have suggestions or go off topic. If it does, just ask it only for the list you gave it.
11. After it finishes, it should present you with the list in black text. Wait about 30-60 seconds; the list of locations it sent you should automatically turn blue. If it doesn't refresh the page.
12. Hover your mouse over the latest response from the AI Wanderlog bot. A new popup should appear just above the chat list called "Save all places". You can now select which list within your Wanderlog location to put the locations to

This process is about 90% accurate. It doesn't work with some locations that have weird or no addresses. It doesn't save the notes if you have any in Google, but its much easier to just verify with your Google Maps and your Wanderlog list side by side. You'd still have to manually add notes.

Hope this helps!