So sorry, OP — I’m in a similar boat, recent death in the family, too mentally tired to plan a vacation like I normally do (luckily we had already decided to not go anywhere for Spring Break).
We’ve been to Puerto Rico several times, and her are a few resorts we liked - they aren’t all-inclusives, but they have pool, beach, bars, restaurants, and…most importantly for my only elementary aged kid, other kids at the pool
https://www.wyndhamriomar.com/
https://www.hyatt.com/en-US/hotel/puerto-rico/hyatt-regency-grand-reserve-puerto-rico/sjurc
Rent a car, drive from the airport to the hotel
Old Town San Juan is fun to just explore — El Morro (the fort) is amazing, fly kites on the huge green space in front, get ice pops here
https://www.paletashop.com/
You can go horseback riding here (also some other activities, I booked this a few weeks ahead of time)
https://carabalirainforestpark.com/
Zip lining (I haven’t been to these, because our LO was too young).
https://rainforestzipline.com/ Or
https://www.toroverdepr.com/
Kayaking in the bioluminescent bay at Fajardo (booked a few weeks ahead of time in spring of 2022, there are other similar companies).
https://pureadventurepr.com/
For El Yunque some sort of passes/tickers are needed — I can’t remember what, but the last time we went (spring 2022) they were sold out a few days before
https://www.recreation.gov/ticket/facility/300017