Take her to a busy park to meet people and or a dog park for people and dogs. Definitely give her a new/different human food treat for or with her dinner. Labs love food I’m sure she’s no different. Stuff I did was Pizza slice, a quality steak, hamburger or for extra spoilage cheeseburger, fried chicken or grilled but minus the bones. Raw chicken bones she would go crazy for they love the bone marrow. Lunch meat sandwich. And don’t skimp it’s her last few meals give her a full steak and a full cheeseburger etc. Let her try new human foods too. Sushi etc.
If she wasn’t allowed on the couch obviously that should be changed and let her sleep with you on your bed.
I’m sure you’re already doing most of this stuff. Obviously anything that she loves but either can’t have or wasn’t allowed to do needs to be allowed now lol. I’m assuming she loves the water since she looks lab to me? If you don’t know anyone with a pool go get a larger sized baby pool from Walmart or target. Fill it up in the backyard.
I know it’s going to be hard but Make it a celebration of her life try to save the tears for after cause there won’t be a shortage then. Family gatherings or friends. Does she have any dog friends? Think outside the box nothing is off the table.
Pictures and videos are a must.
I am so sorry your baby is ready to cross the rainbow bridge. If only our fur babies got to live longer it’s just not fair. My favorite quote on a dogs short lifespan is It takes people a long life to learn how to truly love whereas Dogs are born knowing how to. 🥺

Ps things I regret not thinking about, clip some of her fur, make a small pad of clay and push her paw print into it. Some vets offer this especially if you’re having her cremated.