Entertaining baby- independent or parent based

I need ideas :) my baby is 8 weeks and I feel like I’m hindering her development. I have a swing and a fisher price activity mat with a mirror and piano. I use my legs to prop her up on the mat due to her bad reflux so I don’t let her lay flat often (even at night) Baby does not tolerate being in the swing longer than 5 to 10 minutes. I play with her on the mat daily. Otherwise she’s being held by me or sleeping in her car seat when we go out and about. What are some toys/gyms/activity you have/do with your 2 month olds to help them develop mentally and physically?

Names or pictures of items would be super helpful!!