I have seen advertisements in the past for boat lifts that actually attach under the deck of the pontoon, and thus travel with the boat. Here is one company that looks to have Channel Marine as a dealer:
https://sea-legs.com/
I don’t know anyone that has this setup or what the drawbacks are, but thought if we ever got a pontoon boat, I would want to look into this set up more. The nice thing is that you never have to worry about taking the lift in and out of the water since it is mounted to the pontoon deck.