No not all rides. Quite a few rides with no restrictions or some that have a max of 700lb plus but that's shared between 1 - 6 riders so could go on your own or with another. If you put into Google search "volcano bay riders guide pdf" the top search result will be the pdf you can look through.
The only rides that I recall having weight restrictions were rides with rafts. Everyone stands on a scale that calculates the total weight of your party. I looked at the scale once and saw a total weight of 550lbs and we were good to go. It may just mean that 5 people don't go on a 5 person raft. None of the non-raft rides had scales.
Maybe a few but very few. I did not do the crazy drop one at top of the Volcano. All the raft ones anyone can go. Even the two lazy rivers are so much fun!! Look on line and you will see the raft sizes and enjoy if you go!!!
Not all but some did my friend is 280 and he had to ride alone on most
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