We have an Ecoflow unit, same sort of thing. When we bought it, Jackery were I think using Lithium ion batteries rather than LiFe Po4 batteries (though the newer units now use the later I believe) and there was something about the Bluetti I didn't like.
It wasn't really bought for powering things on the boat specifically, it's used for camping and other activites (eg recharging power tool batteries when away from mains) , but we do use it on our narrowboat as the electric system needs some upgrading. It's on the to do list but until that time we use it for powering some 240V stuff (eg toaster, rice cooker, the occasional mains power tool) to reduce the load on the boats system especially when not much solar about) We don't live aboard but when we use it on the boat I either recharge it from the boats inverter when cruising or from the 12V supply. I keep meaning to get round to rigging it up so that I could recharge from the boats solar
Ours is a Delta 2 unit. 1024 Wh battery IIRC. which works for what we use it for, and is a size and weight that it's pretty easy to move about
I don't think I'd buy one for a boat specifically, the money probably better spent in that case on a better built in system, especially if we are talking something that can run something like an air fryer. unless it was as a tide you over situation until permanent stuff can be