That's good that you were able to use AirTags. We called Luggage Forward to organize pickup for our cruise last May. They said that AirTags would be removed out of our luggage which had to be unlocked because it was going between two countries. Given that, we decided not to use Luggage Forward because we have read some posts about luggage being lost with no way of personally tracking it or items going missing.
We lucked out because we were in Barcelona in March after a trans Atlantic with Viking and we were again in Barcelona to start our Med cruises in May. Our Barcelona hotel, GranVia, were happy to keep our luggage for 7 weeks. During that time, it was fun to see the connections to our AirTags.
I think most people use Luggage Forward with success, but I don't think it's for us.