I think you'll be fine with a 23 pound machine with any of the sturdy appliance lifts. I use one in the shop for my OSS which lives under the drum sander. So there's the weight of the tool plus the weight of the sturdy work surface I used for the purpose. For whatever lift you choose, be sure to follow the installation instructions carefully so that when it's in the "up" position, the work surface that the sealer sits on clears the counter edge.

I use a smaller sealer and it just lives on the top shelf of one of the corner turntable thingies...'gets pulled out only when needed, but my use is incidental compared to yours. If I actually had an appropriate cabinet, I'd do this for the small microwave since it's only used a few times a week for little jobs like a frozen lunch or melting butter. But our kitchen now is too small to even think about that. (The two things I do miss about our old property was the large kitchen and the room sized shower. )